CVE-2024-28190 (JavaScript, published 2024-04-09T14:15Z)
Description: value: Contao is an open source content management system. Starting in version 4.0.0 and prior to version 4.13.40 and 5.3.4, users can inject malicious code in filenames when uploading files (back end and front end), which is then executed in tooltips and popups in the back end. Contao versions 4.13.40 and 5.3.4 have a patch for this issue. As a workaround, remove upload fields from frontend forms and disable uploads for untrusted back end users.
Severity: nan (CVSS v3 base score: )
Weakness: NVD-CWE-noinfo \u2014 Insufficient Information
There is insufficient information about the issue to classify it; details are unkown or unspecified.
Repository: https://github.com/contao/contao
Files changed:
core-bundle/src/Resources/contao/drivers/DC_Folder.php
core-bundle/src/Resources/public/core.js
core-bundle/src/Resources/public/core.min.js
core-bundle/src/Resources/public/mootao.js
core-bundle/src/Resources/public/mootao.min.js
Commit message: Merge pull request from GHSA-v24p-7p4j-qvvf

* Encode file names in tooltips and titles

* Remove ampersands in sanitizeFileName()

* Revert "Remove ampersands in sanitizeFileName()"

This reverts commit 81d06fe1ba46a969f5eacfa1420a8519379e0262.

---------

Co-authored-by: Leo Feyer <1192057+leofeyer@users.noreply.github.com>

Vulnerable code:
			$strFolderNameEncoded = StringUtil::convertEncoding(StringUtil::specialchars(basename($currentFolder)), System::getContainer()->getParameter('kernel.charset'));
			$strFileNameEncoded = StringUtil::convertEncoding(StringUtil::specialchars(basename($currentFile)), System::getContainer()->getParameter('kernel.charset'));
			'title': opt.title,
			'title': opt.title,
			'title': opt.title,
var AjaxRequest={themePath:Contao.script_url+"system/themes/"+Contao.theme+"/",toggleNavigation:function(e,t,n){var a=$(t),o=$(e).getParent("li");return a&&(o.hasClass("collapsed")?(o.removeClass("collapsed"),$(e).setAttribute("aria-expanded","true"),$(e).store("tip:title",Contao.lang.collapse),new Request.Contao({url:n}).post({action:"toggleNavigation",id:t,state:1,REQUEST_TOKEN:Contao.request_token})):(o.addClass("collapsed"),$(e).setAttribute("aria-expanded","false"),$(e).store("tip:title",Contao.lang.expand),new Request.Contao({url:n}).post({action:"toggleNavigation",id:t,state:0,REQUEST_TOKEN:Contao.request_token}))),!1},toggleStructure:function(i,l,s,r){i.blur();var e=$(l),c=$(i).getFirst("img");return e?"none"==e.getStyle("display")?(e.setStyle("display",null),c.src=AjaxRequest.themePath+"icons/folMinus.svg",$(i).store("tip:title",Contao.lang.collapse),new Request.Contao({field:i}).post({action:"toggleStructure",id:l,state:1,REQUEST_TOKEN:Contao.request_token})):(e.setStyle("display","none"),c.src=AjaxRequest.themePath+"icons/folPlus.svg",$(i).store("tip:title",Contao.lang.expand),new Request.Contao({field:i}).post({action:"toggleStructure",id:l,state:0,REQUEST_TOKEN:Contao.request_token})):new Request.Contao({field:i,evalScripts:!0,onRequest:function(){AjaxRequest.displayBox(Contao.lang.loading+" …")},onSuccess:function(e){var t=new Element("li",{id:l,class:"parent",styles:{display:"inline"}});if(new Element("ul",{class:"level_"+s,html:e}).inject(t,"bottom"),5==r)t.inject($(i).getParent("li"),"after");else{for(var n,a=!1,o=$(i).getParent("li");"element"==typeOf(o)&&(n=o.getNext("li"));)if((o=n).hasClass("tl_folder")){a=!0;break}a?t.inject(o,"before"):t.inject(o,"after")}t.getElements("a").each(function(e){e.href=e.href.replace(/&ref=[a-f0-9]+/,"&ref="+Contao.referer_id)}),$(i).store("tip:title",Contao.lang.collapse),c.src=AjaxRequest.themePath+"icons/folMinus.svg",window.fireEvent("structure"),AjaxRequest.hideBox(),window.fireEvent("ajax_change")}}).post({action:"loadStructure",id:l,level:s,state:1,REQUEST_TOKEN:Contao.request_token}),!1},toggleFileManager:function(n,a,e,o){n.blur();var t=$(a),i=$(n).getFirst("img");return t?"none"==t.getStyle("display")?(t.setStyle("display",null),i.src=AjaxRequest.themePath+"icons/folMinus.svg",$(n).store("tip:title",Contao.lang.collapse),new Request.Contao({field:n}).post({action:"toggleFileManager",id:a,state:1,REQUEST_TOKEN:Contao.request_token})):(t.setStyle("display","none"),i.src=AjaxRequest.themePath+"icons/folPlus.svg",$(n).store("tip:title",Contao.lang.expand),new Request.Contao({field:n}).post({action:"toggleFileManager",id:a,state:0,REQUEST_TOKEN:Contao.request_token})):new Request.Contao({field:n,evalScripts:!0,onRequest:function(){AjaxRequest.displayBox(Contao.lang.loading+" …")},onSuccess:function(e){var t=new Element("li",{id:a,class:"parent",styles:{display:"inline"}});new Element("ul",{class:"level_"+o,html:e}).inject(t,"bottom"),t.inject($(n).getParent("li"),"after"),t.getElements("a").each(function(e){e.href=e.href.replace(/&ref=[a-f0-9]+/,"&ref="+Contao.referer_id)}),$(n).store("tip:title",Contao.lang.collapse),i.src=AjaxRequest.themePath+"icons/folMinus.svg",AjaxRequest.hideBox(),window.fireEvent("ajax_change")}}).post({action:"loadFileManager",id:a,level:o,folder:e,state:1,REQUEST_TOKEN:Contao.request_token}),!1},togglePagetree:function(n,a,e,t,o){n.blur(),Backend.getScrollOffset();var i=$(a),l=$(n).getFirst("img");return i?"none"==i.getStyle("display")?(i.setStyle("display",null),l.src=AjaxRequest.themePath+"icons/folMinus.svg",$(n).store("tip:title",Contao.lang.collapse),new Request.Contao({field:n}).post({action:"togglePagetree",id:a,state:1,REQUEST_TOKEN:Contao.request_token})):(i.setStyle("display","none"),l.src=AjaxRequest.themePath+"icons/folPlus.svg",$(n).store("tip:title",Contao.lang.expand),new Request.Contao({field:n}).post({action:"togglePagetree",id:a,state:0,REQUEST_TOKEN:Contao.request_token})):new Request.Contao({field:n,evalScripts:!0,onRequest:function(){AjaxRequest.displayBox(Contao.lang.loading+" …")},onSuccess:function(e){var t=new Element("li",{id:a,class:"parent",styles:{display:"inline"}});new Element("ul",{class:"level_"+o,html:e}).inject(t,"bottom"),t.inject($(n).getParent("li"),"after"),t.getElements("a").each(function(e){e.href=e.href.replace(/&ref=[a-f0-9]+/,"&ref="+Contao.referer_id)}),$(n).store("tip:title",Contao.lang.collapse),l.src=AjaxRequest.themePath+"icons/folMinus.svg",AjaxRequest.hideBox(),window.fireEvent("ajax_change")}}).post({action:"loadPagetree",id:a,level:o,field:e,name:t,state:1,REQUEST_TOKEN:Contao.request_token}),!1},toggleFiletree:function(n,a,e,t,o,i){n.blur(),Backend.getScrollOffset();var l=$(a),s=$(n).getFirst("img");return l?"none"==l.getStyle("display")?(l.setStyle("display",null),s.src=AjaxRequest.themePath+"icons/folMinus.svg",$(n).store("tip:title",Contao.lang.collapse),new Request.Contao({field:n}).post({action:"toggleFiletree",id:a,state:1,REQUEST_TOKEN:Contao.request_token})):(l.setStyle("display","none"),s.src=AjaxRequest.themePath+"icons/folPlus.svg",$(n).store("tip:title",Contao.lang.expand),new Request.Contao({field:n}).post({action:"toggleFiletree",id:a,state:0,REQUEST_TOKEN:Contao.request_token})):new Request.Contao({field:n,evalScripts:!0,onRequest:function(){AjaxRequest.displayBox(Contao.lang.loading+" …")},onSuccess:function(e){var t=new Element("li",{id:a,class:"parent",styles:{display:"inline"}});new Element("ul",{class:"level_"+i,html:e}).inject(t,"bottom"),t.inject($(n).getParent("li"),"after"),t.getElements("a").each(function(e){e.href=e.href.replace(/&ref=[a-f0-9]+/,"&ref="+Contao.referer_id)}),$(n).store("tip:title",Contao.lang.collapse),s.src=AjaxRequest.themePath+"icons/folMinus.svg",AjaxRequest.hideBox(),window.fireEvent("ajax_change")}}).post({action:"loadFiletree",id:a,folder:e,level:i,field:t,name:o,state:1,REQUEST_TOKEN:Contao.request_token}),!1},toggleSubpalette:function(a,o,e){a.blur();var t=$(o);function i(e){a.form.elements.VERSION_NUMBER&&(a.form.elements.VERSION_NUMBER.value=/<input\s+[^>]*?name="VERSION_NUMBER"\s+[^>]*?value="([^"]*)"/i.exec(e)[1])}t?a.value?(a.value="",a.checked="",t.setStyle("display","none"),t.getElements("[required]").each(function(e){e.set("required",null).set("data-required","")}),new Request.Contao({field:a,onSuccess:i}).post({action:"toggleSubpalette",id:o,field:e,state:0,REQUEST_TOKEN:Contao.request_token})):(a.value=1,a.checked="checked",t.setStyle("display",null),t.getElements("[data-required]").each(function(e){e.set("required","").set("data-required",null)}),new Request.Contao({field:a,onSuccess:i}).post({action:"toggleSubpalette",id:o,field:e,state:1,REQUEST_TOKEN:Contao.request_token})):new Request.Contao({field:a,evalScripts:!1,onRequest:function(){AjaxRequest.displayBox(Contao.lang.loading+" …")},onSuccess:function(e,t){var n=new Element("div",{id:o,class:"subpal cf",html:e,styles:{display:"block"}}).inject($(a).getParent("div").getParent("div"),"after");t.javascript&&(document.write=function(e){var n="";e.replace(/<script src="([^"]+)"/i,function(e,t){n=t}),n&&Asset.javascript(n,{onLoad:function(){Browser.exec(t.javascript)}})},Browser.exec(t.javascript)),a.value=1,a.checked="checked",n.getElements("a").each(function(e){e.href=e.href.replace(/&ref=[a-f0-9]+/,"&ref="+Contao.referer_id)}),i(e),AjaxRequest.hideBox(),window.fireEvent("subpalette"),window.fireEvent("ajax_change")}}).post({action:"toggleSubpalette",id:o,field:e,load:1,state:1,REQUEST_TOKEN:Contao.request_token})},toggleField:function(e,t){e.blur();var n,a,o=null,i=$(e).getFirst("img"),l=1==i.get("data-state"),s=e.getParent("div");return t&&(s.hasClass("tl_right")?o=s.getPrevious("div").getElement("img"):s.hasClass("tl_listing_container")?(null===(o=e.getParent("td").getPrevious("td").getFirst("div.list_icon"))&&(o=e.getParent("td").getPrevious("td").getElement("div.cte_type")),null===o&&(o=e.getParent("tr").getFirst("td").getElement("div.list_icon_new"))):(n=s.getNext("div"))&&(n.hasClass("cte_type")&&(o=n),null===o&&(o=n.getFirst("div.list_icon"))),null!==o&&("img"==o.nodeName.toLowerCase()?(o.getParent("ul.tl_listing").hasClass("tl_tree_xtnd")||(a=o.getParent("a"))&&-1==a.href.indexOf("contao/preview")&&(o=(n=a.getNext("a"))?n.getFirst("img"):new Element("img")),o.src=l?o.get("data-icon-disabled"):o.get("data-icon")):o.hasClass("cte_type")?l?(o.addClass("unpublished"),o.removeClass("published")):(o.addClass("published"),o.removeClass("unpublished")):o.setStyle("background-image","url("+(l?o.get("data-icon-disabled"):o.get("data-icon"))+")"))),i.src=l?i.get("data-icon-disabled"):i.get("data-icon"),i.set("data-state",l?0:1),new Request.Contao({url:e.href,followRedirects:!1}).get(),!1},toggleVisibility:function(e,t,n){window.console&&console.warn("AjaxRequest.toggleVisibility() is deprecated. Please use the new toggle operation."),e.blur();var a,o,i,l,s,r,c=null,d=$(e).getFirst("img"),u=1==d.get("data-state"),g=e.getParent("div");return null===d.get("data-state")&&(u=-1==d.src.indexOf("invisible"),window.console&&console.warn('Using a visibility toggle without a "data-state" attribute is deprecated. Please adjust your Contao DCA file.')),g.hasClass("tl_right")?c=g.getPrevious("div").getElement("img"):g.hasClass("tl_listing_container")?(null===(c=e.getParent("td").getPrevious("td").getFirst("div.list_icon"))&&(c=e.getParent("td").getPrevious("td").getElement("div.cte_type")),null===c&&(c=e.getParent("tr").getFirst("td").getElement("div.list_icon_new"))):(o=g.getNext("div"))&&(o.hasClass("cte_type")&&(c=o),null===c&&(c=o.getFirst("div.list_icon"))),null!==c&&("img"==c.nodeName.toLowerCase()?(c.getParent("ul.tl_listing").hasClass("tl_tree_xtnd")?(i=c.get("data-icon"),l=c.get("data-icon-disabled"),null===i&&(i=c.src.replace(/(.*)\/([a-z0-9]+)_?\.(gif|png|jpe?g|svg)$/,"$1/$2.$3"),window.console&&console.warn('Using a row icon without a "data-icon" attribute is deprecated. Please adjust your Contao DCA file.')),null===l&&(l=c.src.replace(/(.*)\/([a-z0-9]+)_?\.(gif|png|jpe?g|svg)$/,"$1/$2_.$3"),window.console&&console.warn('Using a row icon without a "data-icon-disabled" attribute is deprecated. Please adjust your Contao DCA file.'))):((s=c.getParent("a"))&&-1==s.href.indexOf("contao/preview")&&(c=(o=s.getNext("a"))?o.getFirst("img"):new Element("img")),i=c.get("data-icon"),l=c.get("data-icon-disabled"),null===i&&(a=c.src.replace(/.*_([0-9])\.(gif|png|jpe?g|svg)/,"$1"),i=c.src.replace(/_[0-9]\.(gif|png|jpe?g|svg)/,(1==a.toInt()?"":"_"+(a.toInt()-1))+".$1").split(/[\\/]/).pop(),window.console&&console.warn('Using a row icon without a "data-icon" attribute is deprecated. Please adjust your Contao DCA file.')),null===l&&(a=c.src.replace(/.*_([0-9])\.(gif|png|jpe?g|svg)/,"$1"),l=c.src.replace(/(_[0-9])?\.(gif|png|jpe?g|svg)/,(a==c.src?"_1":"_"+(a.toInt()+1))+".$2").split(/[\\/]/).pop(),window.console&&console.warn('Using a row icon without a "data-icon-disabled" attribute is deprecated. Please adjust your Contao DCA file.'))),-1==i.indexOf("/")&&(i=AjaxRequest.themePath+(i.match(/\.svg$/)?"icons/":"images/")+i),-1==l.indexOf("/")&&(l=AjaxRequest.themePath+(l.match(/\.svg$/)?"icons/":"images/")+l),c.src=u?l:i):c.hasClass("cte_type")?u?(c.addClass("unpublished"),c.removeClass("published")):(c.addClass("published"),c.removeClass("unpublished")):(i=c.get("data-icon"),l=c.get("data-icon-disabled"),null===i&&(i=c.getStyle("background-image").replace(/(.*)\/([a-z0-9]+)_?\.(gif|png|jpe?g|svg)\);?$/,"$1/$2.$2"),window.console&&console.warn('Using a row icon without a "data-icon" attribute is deprecated. Please adjust your Contao DCA file.')),null===l&&(l=c.getStyle("background-image").replace(/(.*)\/([a-z0-9]+)_?\.(gif|png|jpe?g|svg)\);?$/,"$1/$2_.$3"),window.console&&console.warn('Using a row icon without a "data-icon-disabled" attribute is deprecated. Please adjust your Contao DCA file.')),-1==i.indexOf("/")&&(i=AjaxRequest.themePath+(i.match(/\.svg$/)?"icons/":"images/")+i),-1==l.indexOf("/")&&(l=AjaxRequest.themePath+(l.match(/\.svg$/)?"icons/":"images/")+l),c.setStyle("background-image","url("+(u?l:i)+")"))),"tl_style"==n&&g.getParent("div").getElement("pre").toggleClass("disabled"),i=d.get("data-icon")||AjaxRequest.themePath+"icons/visible.svg",l=d.get("data-icon-disabled")||AjaxRequest.themePath+"icons/invisible.svg",-1!==e.href.indexOf("act=toggle")?(d.src=u?l:i,d.set("data-state",u?0:1),new Request.Contao({url:e.href,followRedirects:!1}).get()):(d.src=u?l:i,d.set("data-state",u?0:1),(r={state:u?0:1,rt:Contao.request_token})[$(e).get("data-tid")||"tid"]=t,new Request.Contao({url:window.location.href,followRedirects:!1}).get(r)),!1},toggleFeatured:function(e,t){window.console&&console.warn("AjaxRequest.toggleFeatured() is deprecated. Please use the new toggle operation."),e.blur();var n=$(e).getFirst("img"),a=1==n.get("data-state");return null===n.get("data-state")&&(a=-1==n.src.indexOf("featured_"),window.console&&console.warn('Using a featured toggle without a "data-state" attribute is deprecated. Please adjust your Contao DCA file.')),a?(n.src=AjaxRequest.themePath+"icons/featured_.svg",n.set("data-state",0),(new Request.Contao).post({action:"toggleFeatured",id:t,state:0,REQUEST_TOKEN:Contao.request_token})):(n.src=AjaxRequest.themePath+"icons/featured.svg",n.set("data-state",1),(new Request.Contao).post({action:"toggleFeatured",id:t,state:1,REQUEST_TOKEN:Contao.request_token})),!1},toggleFieldset:function(e,t,n){e.blur(),Backend.getScrollOffset();var a=$("pal_"+t);if(a.hasClass("collapsed"))a.removeClass("collapsed"),(new Request.Contao).post({action:"toggleFieldset",id:t,table:n,state:1,REQUEST_TOKEN:Contao.request_token});else{for(var o=a.getParent("form"),i=a.getElements("[required]"),l=!0,s=0;s<i.length;s++)if(!i[s].get("value")){l=!1;break}l?(a.addClass("collapsed"),(new Request.Contao).post({action:"toggleFieldset",id:t,table:n,state:0,REQUEST_TOKEN:Contao.request_token})):"function"==typeof o.checkValidity&&o.getElement('button[type="submit"]').click()}return!1},toggleCheckboxGroup:function(e,t){e.blur();var n=$(t),a=$(e).getFirst("img");return!!n&&("none"==n.getStyle("display")?(n.setStyle("display",null),a.src=AjaxRequest.themePath+"icons/folMinus.svg",(new Request.Contao).post({action:"toggleCheckboxGroup",id:t,state:1,REQUEST_TOKEN:Contao.request_token})):(n.setStyle("display","none"),a.src=AjaxRequest.themePath+"icons/folPlus.svg",(new Request.Contao).post({action:"toggleCheckboxGroup",id:t,state:0,REQUEST_TOKEN:Contao.request_token})),!0)},displayBox:function(e){var t=$("tl_ajaxBox"),n=$("tl_ajaxOverlay"),a=window.getScroll();null===n&&(n=new Element("div",{id:"tl_ajaxOverlay"}).inject($(document.body),"bottom")),n.set({styles:{display:"block",top:a.y+"px"}}),null===t&&(t=new Element("div",{id:"tl_ajaxBox"}).inject($(document.body),"bottom")),t.set({html:e,styles:{display:"block",top:a.y+100+"px"}})},hideBox:function(){var e=$("tl_ajaxBox"),t=$("tl_ajaxOverlay");t&&t.setStyle("display","none"),e&&e.setStyle("display","none")}},Backend={currentId:null,xMousePosition:0,yMousePosition:0,popupWindow:null,themePath:Contao.script_url+"system/themes/"+Contao.theme+"/",getMousePosition:function(e){Backend.xMousePosition=e.client.x,Backend.yMousePosition=e.client.y},openWindow:function(e,t,n){e.blur(),t=Browser.ie?t+40:t+17,n=Browser.ie?n+30:n+17,Backend.popupWindow=window.open(e.href,"","width="+t+",height="+n+",modal=yes,left=100,top=50,location=no,menubar=no,resizable=yes,scrollbars=yes,status=no,toolbar=no")},openModalWindow:function(e,t,n){new SimpleModal({width:e,hideFooter:!0,draggable:!1,overlayOpacity:.7,onShow:function(){document.body.setStyle("overflow","hidden")},onHide:function(){document.body.setStyle("overflow","auto")}}).show({title:t,contents:n})},openModalImage:function(e){var t=e||{},n=(window.getSize().x-20).toInt();(!t.width||t.width>n)&&(t.width=Math.min(n,900)),new SimpleModal({width:t.width,hideFooter:!0,draggable:!1,overlayOpacity:.7,onShow:function(){document.body.setStyle("overflow","hidden")},onHide:function(){document.body.setStyle("overflow","auto")}}).show({title:t.title,contents:'<img src="'+t.url+'" alt="">'})},openModalIframe:function(e){var t=e||{},n=(window.getSize().x-20).toInt(),a=(window.getSize().y-137).toInt();(!t.width||t.width>n)&&(t.width=Math.min(n,900)),(!t.height||t.height>a)&&(t.height=a),new SimpleModal({width:t.width,hideFooter:!0,draggable:!1,overlayOpacity:.7,onShow:function(){document.body.setStyle("overflow","hidden")},onHide:function(){document.body.setStyle("overflow","auto")}}).show({title:t.title,contents:'<iframe src="'+t.url+'" width="100%" height="'+t.height+'" frameborder="0"></iframe>',model:"modal"})},openModalSelector:function(e){var d=e||{},t=(window.getSize().x-20).toInt(),n=(window.getSize().y-192).toInt();d.id||(d.id="tl_select"),(!d.width||d.width>t)&&(d.width=Math.min(t,900)),(!d.height||d.height>n)&&(d.height=n);var a=new SimpleModal({width:d.width,draggable:!1,overlayOpacity:.7,onShow:function(){document.body.setStyle("overflow","hidden")},onHide:function(){document.body.setStyle("overflow","auto")}});a.addButton(Contao.lang.cancel,"btn",function(){this.buttons[0].hasClass("btn-disabled")||this.hide()}),a.addButton(Contao.lang.apply,"btn primary",function(){if(!this.buttons[1].hasClass("btn-disabled")){var e,t,n,a,o,i,l,s,r=window.frames["simple-modal-iframe"],c=[];if(void 0!==r){for((l=(e=r.document.getElementById(d.id)).get("data-picker-value"))&&(c=JSON.parse(l)),t=e.getElementsByTagName("input"),i=0;i<t.length;i++)t[i].id.match(/^(check_all_|reset_)/)||(s=c.indexOf(t[i].get("value")),t[i].checked?-1==s&&c.push(t[i].get("value")):-1!=s&&c.splice(s,1));d.callback?d.callback(e.get("data-table"),c):d.tag&&(n=$(d.tag))?(window.console&&console.warn("Using the modal selector without a callback function is deprecated. Please adjust your Contao DCA file."),n.value=c.join(","),(o=e.get("data-inserttag"))&&(n.value="{{"+o+"::"+n.value+"}}"),d.self.set("href",d.self.get("href").replace(/&value=[^&]*/,"&value="+c.join(",")))):d.id&&(n=$("ctrl_"+d.id))&&(a=e.get("data-callback"))&&(window.console&&console.warn("Using the modal selector without a callback function is deprecated. 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a=n.getElement('img[src$="/icons/new.svg"]');a=a&&a.getParent("a")}}if(a&&a.href){if(c.options.url=""+a.href,n.addClass("tl_folder_dropping"),l!==n){l=n,s=(new Date).getTime();var o=n.getElement('img[src$="/icons/folPlus.svg"]');(o=o&&o.getParent("a"))&&setTimeout(function(){if(l===n&&s+900<(new Date).getTime()){var e=document.createEvent("HTMLEvents");e.initEvent("click",!0,!0),o.dispatchEvent(e),s=l=void 0}},1e3)}}else c.options.url=r,s=l=void 0}}),c.on("drop",function(e){e.dataTransfer&&e.dataTransfer.types&&-1!==e.dataTransfer.types.indexOf("Files")&&(t.addClass("dropzone-filetree-enabled"),Backend.getScrollOffset())}),c.on("dragleave",function(){i.getElements(".tl_folder_dropping").removeClass("tl_folder_dropping"),s=l=void 0})},crawl:function(){var a=2e3,e=$("tl_crawl"),c=e.getElement("div.progress-bar"),d=e.getElement("p.progress-count"),u=e.getElement("div.results");!function n(e){e=e||!1;new Request({url:window.location.href,headers:{"Only-Status-Update":e},onSuccess:function(e){var t=JSON.decode(e);!function(e){var t,n=e.total-e.pending,a=0<e.total?parseInt(n/e.total*100,10):100;if(c.setStyle("width",a+"%"),c.set("html",a+"%"),c.setAttribute("aria-valuenow",a),d.set("html",n+" / "+e.total),e.finished)for(t in c.removeClass("running").addClass("finished"),u.removeClass("running").addClass("finished"),e.results)if(e.results.hasOwnProperty(t)){var o=u.getElement('.result[data-subscriber="'+t+'"] p.summary'),i=u.getElement('.result[data-subscriber="'+t+'"] p.warning'),l=u.getElement('.result[data-subscriber="'+t+'"] p.subscriber-log'),s=e.results[t],r=s.summary;s.warning&&i.set("html",s.warning),s.hasLog&&l.setStyle("display","block"),o.addClass(s.wasSuccessful?"success":"failure"),o.set("html",r)}}(t),t.finished||setTimeout(n,a)}}).send()}(!0)}};document.addEvent("mousedown",function(e){Backend.getMousePosition(e)}),window.addEvent("domready",function(){$(document.body).addClass("js"),Browser.Features.Touch&&$(document.body).addClass("touch"),Backend.collapsePalettes(),Backend.addInteractiveHelp(),Backend.tableWizardSetWidth(),Backend.enableImageSizeWidgets(),Backend.enableToggleSelect(),Backend.autoFocusFirstInputField(),null!=Elements.chosen&&$$("select.tl_chosen").chosen(),$$("textarea.monospace").each(function(e){Backend.toggleWrap(e)})}),window.addEvent("resize",function(){Backend.tableWizardSetWidth()}),window.addEvent("load",function(){Backend.limitPreviewHeight()}),window.addEvent("ajax_change",function(){Backend.addInteractiveHelp(),Backend.enableImageSizeWidgets(),Backend.enableToggleSelect(),null!=Elements.chosen&&$$("select.tl_chosen").filter(function(e){return"none"!=e.getStyle("display")}).chosen()});
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e.dragOptions=Object.merge(e.dragOptions||{},{preventDefault:e.dragOptions&&e.dragOptions.preventDefault||Browser.Features.Touch}),void 0===e.dragOptions.unDraggableTags&&(e.dragOptions.unDraggableTags=this.options.unDraggableTags.filter(function(t){return"button"!=t})),this.previous.apply(this,arguments)},addItems:function(){return Array.flatten(arguments).each(function(e){this.elements.push(e);var t=e.retrieve("sortables:start",function(t){this.start.call(this,t,e)}.bind(this));(this.options.handle&&e.getElement(this.options.handle)||e).addEvents({mousedown:t,touchstart:t})},this),this},removeItems:function(){return $$(Array.flatten(arguments).map(function(t){this.elements.erase(t);var e=t.retrieve("sortables:start");return(this.options.handle&&t.getElement(this.options.handle)||t).removeEvents({mousedown:e,touchend:e}),t},this))},getClone:function(t,e){if(!this.options.clone)return new Element(e.tagName).inject(document.body);if("function"==typeOf(this.options.clone))return 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Class({options:{id:0,trail:null,titleField:null,titleFallbackField:null,aliasField:null,descriptionField:null,descriptionFallbackField:null,titleTag:null},shorten:function(t,e){return t.length<=e?t:t.substr(0,t.lastIndexOf(" ",e))+" …"},html2string:function(t){return(new DOMParser).parseFromString(t,"text/html").body.textContent},getTinymce:function(){if(window.tinyMCE&&this.options.descriptionFallbackField)return window.tinyMCE.get(this.options.descriptionFallbackField)},initialize:function(){this.options=Object.merge.apply(null,[{},this.options].append(arguments));var t=$("serp_title_"+this.options.id),e=$("serp_url_"+this.options.id),i=$("serp_description_"+this.options.id),s=$(this.options.titleField),n=$(this.options.titleFallbackField),o=$(this.options.aliasField),a=$(this.options.descriptionField),r=$(this.options.descriptionFallbackField),h=-1===this.options.trail.indexOf("›"),l=this.options.titleTag||"%s";s&&s.addEvent("input",function(){s.value?t.set("text",this.shorten(l.replace(/%s/,s.value).replace(/%%/g,"%"),64)):n&&n.value?t.set("text",this.shorten(this.html2string(l.replace(/%s/,n.value)).replace(/%%/g,"%"),64)):t.set("text","")}.bind(this)),n&&n.addEvent("input",function(){s&&s.value||t.set("text",this.shorten(this.html2string(l.replace(/%s/,n.value)).replace(/%%/g,"%"),64))}.bind(this)),o&&o.addEvent("input",function(){"index"==o.value&&h?e.set("text",this.options.trail):e.set("text",this.options.trail+" › "+(o.value||this.options.id).replace(/\//g," › "))}.bind(this)),a&&a.addEvent("input",function(){if(a.value)i.set("text",this.shorten(a.value,160));else{var t=this.getTinymce();t?i.set("text",this.shorten(this.html2string(t.getContent()),160)):r&&r.value?i.set("text",this.shorten(this.html2string(r.value),160)):i.set("text","")}}.bind(this)),r&&r.addEvent("input",function(){a&&a.value||i.set("text",this.shorten(this.html2string(r.value),160))}.bind(this)),setTimeout(function(){var t=this.getTinymce();t&&t.on("keyup",function(){a&&a.value||i.set("text",this.shorten(this.html2string(window.tinyMCE.activeEditor.getContent()),160))}.bind(this))}.bind(this),4)}});

Fixed code:
			$strFolderNameEncoded = StringUtil::convertEncoding(StringUtil::specialchars(basename($currentFolder), false, true), System::getContainer()->getParameter('kernel.charset'));
			$strFileNameEncoded = StringUtil::convertEncoding(StringUtil::specialchars(basename($currentFile), false, true), System::getContainer()->getParameter('kernel.charset'));
			'title': opt.title && opt.title.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/"/g, '&quot;').replace(/'/g, '&apos;'),
			'title': opt.title && opt.title.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/"/g, '&quot;').replace(/'/g, '&apos;'),
			'title': opt.title && opt.title.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/"/g, '&quot;').replace(/'/g, '&apos;'),
var AjaxRequest={themePath:Contao.script_url+"system/themes/"+Contao.theme+"/",toggleNavigation:function(e,t,n){var a=$(t),o=$(e).getParent("li");return a&&(o.hasClass("collapsed")?(o.removeClass("collapsed"),$(e).setAttribute("aria-expanded","true"),$(e).store("tip:title",Contao.lang.collapse),new Request.Contao({url:n}).post({action:"toggleNavigation",id:t,state:1,REQUEST_TOKEN:Contao.request_token})):(o.addClass("collapsed"),$(e).setAttribute("aria-expanded","false"),$(e).store("tip:title",Contao.lang.expand),new Request.Contao({url:n}).post({action:"toggleNavigation",id:t,state:0,REQUEST_TOKEN:Contao.request_token}))),!1},toggleStructure:function(i,l,s,r){i.blur();var e=$(l),c=$(i).getFirst("img");return e?"none"==e.getStyle("display")?(e.setStyle("display",null),c.src=AjaxRequest.themePath+"icons/folMinus.svg",$(i).store("tip:title",Contao.lang.collapse),new Request.Contao({field:i}).post({action:"toggleStructure",id:l,state:1,REQUEST_TOKEN:Contao.request_token})):(e.setStyle("display","none"),c.src=AjaxRequest.themePath+"icons/folPlus.svg",$(i).store("tip:title",Contao.lang.expand),new Request.Contao({field:i}).post({action:"toggleStructure",id:l,state:0,REQUEST_TOKEN:Contao.request_token})):new Request.Contao({field:i,evalScripts:!0,onRequest:function(){AjaxRequest.displayBox(Contao.lang.loading+" …")},onSuccess:function(e){var t=new Element("li",{id:l,class:"parent",styles:{display:"inline"}});if(new Element("ul",{class:"level_"+s,html:e}).inject(t,"bottom"),5==r)t.inject($(i).getParent("li"),"after");else{for(var 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