Stored Cross-Site Scripting (XSS) vulnerability in GeoServer's REST Resources API
Date: 2024-03
Affected: maven/org.geoserver:gs-restconfig
Attack vector: xss
Category: vulnerability-disclosure
Severity: Medium
CVE: CVE-2023-51445
CWE: CWE-79
CVSS: 4.8 (CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N)

### Summary A stored cross-site scripting (XSS) vulnerability exists that enables an authenticated administrator with workspace-level privileges to store a JavaScript payload in uploaded style/legend resources that will execute in the context of another administrator's browser when viewed in the REST Resources API. Access to the REST Resources API is limited to full administrators by default and granting non-administrators access to this endpoint should be carefully considered as it may allow access to files containing sensitive information. ### Details Upload a new Legend via the New Style page if user has permissions for this. This file is then not checked and is uploaded to the backend system. This file can then be viewed directly by requesting it via the API which will then view the file in its raw format without sanitisation. ![image](https://user-images.githubusercontent.com/6471928/232732469-7dbf2776-5712-4c68-bd12-e2403c136a7c.png) ![image](https://user-images.githubusercontent.com/6471928/232732832-4fe2337f-9b28-41b1-9181-24abff4a6973.png) ### PoC 1 .User makes the following request to upload file. ``` POST /geoserver/web/wicket/bookmarkable/org.geoserver.wms.web.data.StyleNewPage?11-1.IBehaviorListener.0-dialog-dialog-content-form-submit&wicket-ajax=true&wicket-ajax-baseurl=wicket%2Fbookmarkable%2Forg.geoserver.wms.web.data.StyleNewPage%3F11 HTTP/1.1 Host: geoserver:8080 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Firefox/91.0 Accept: t


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Architectural layers (MAESTRO):