CVE-2023-28836: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (CWE-79)
value: Wagtail is an open source content management system built on Django. Starting in version 1.5 and prior to versions 4.1.4 and 4.2.2, a stored cross-site scripting (XSS) vulnerability exists on ModelAdmin views within the Wagtail admin interface. A user with a limited-permission editor account for the Wagtail admin could potentially craft pages and documents that, when viewed by a user with higher privileges, could perform actions with that user's credentials. The vulnerability is not exploitable by an ordinary site visitor without access to the Wagtail admin, and only affects sites with ModelAdmin enabled. For page, the vulnerability is in the "Choose a parent page" ModelAdmin view (`ChooseParentView`), available when managing pages via ModelAdmin. For documents, the vulnerability is in the ModelAdmin Inspect view (`InspectView`) when displaying document fields. Patched versions have been released as Wagtail 4.1.4 and Wagtail 4.2.2. Site owners who are unable to upgrade to the new versions can disable or override the corresponding functionality.
CWE description: The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
CVSS v3 base score: 5.4
Published: 2023-04-03T17:15Z
Repository: https://github.com/wagtail/wagtail
Language: Markdown
Files changed: CHANGELOG.txt, docs/releases/4.2.2.md
Commit date: 2023-04-03 12:41:18 +0200
Commit message: Release note for CVE-2023-28836 in 4.2.2

Diff: diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index d5fbc22253..89782a1d3d 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -103,10 +103,11 @@ Changelog
 
 
 4.2.2 (xx.xx.xxxx) - IN DEVELOPMENT
 ~~~~~~~~~~~~~~~~~~
 
+ * Fix: CVE-2023-28836 - Stored XSS attack via ModelAdmin views (Thibaud Colas)
  * Fix: Fix radio and checkbox elements shrinking when using a long label (Sage Abdullah)
  * Fix: Fix select elements expanding beyond their container when using a long option label (Sage Abdullah)
  * Fix: Fix timezone handling of `TemplateResponse`s for users with a custom timezone (Stefan Hammer, Sage Abdullah)
  * Fix: Ensure TableBlock initialisation correctly runs after load and its width is aligned with the parent panel (Dan Braghis)
  * Fix: Ensure that the JavaScript media files are loaded by default in Snippet index listings for date fields (Sage Abdullah)
diff --git a/docs/releases/4.2.2.md b/docs/releases/4.2.2.md
index 7408c244ec..f9d70ed600 100644
--- a/docs/releases/4.2.2.md
+++ b/docs/releases/4.2.2.md
@@ -9,10 +9,16 @@ depth: 1
 ---
 ```
 
 ## What's new
 
+### CVE-2023-28836: Stored XSS attack via ModelAdmin views
+
+This release addresses a stored cross-site scripting (XSS) vulnerability on ModelAdmin views within the Wagtail admin interface. A user with a limited-permission editor account for the Wagtail admin could potentially craft pages and documents that, when viewed by a user with higher privileges, could perform actions with that user's credentials. The vulnerability is not exploitable by an ordinary site visitor without access to the Wagtail admin, and only affects sites with ModelAdmin enabled.
+
+Many thanks to Thibaud Colas for reporting this issue. For further details, please see [the CVE-2023-28836 security advisory](https://github.com/wagtail/wagtail/security/advisories/GHSA-5286-f2rf-35c2).
+
 ### Bug fixes
 
 * Fix radio and checkbox elements shrinking when using a long label (Sage Abdullah)
 * Fix select elements expanding beyond their container when using a long option label (Sage Abdullah)
 * Fix timezone handling of `TemplateResponse`s for users with a custom timezone (Stefan Hammer, Sage Abdullah)

Fixed code:  * Fix: CVE-2023-28836 - Stored XSS attack via ModelAdmin views (Thibaud Colas)
### CVE-2023-28836: Stored XSS attack via ModelAdmin views

This release addresses a stored cross-site scripting (XSS) vulnerability on ModelAdmin views within the Wagtail admin interface. A user with a limited-permission editor account for the Wagtail admin could potentially craft pages and documents that, when viewed by a user with higher privileges, could perform actions with that user's credentials. The vulnerability is not exploitable by an ordinary site visitor without access to the Wagtail admin, and only affects sites with ModelAdmin enabled.

Many thanks to Thibaud Colas for reporting this issue. For further details, please see [the CVE-2023-28836 security advisory](https://github.com/wagtail/wagtail/security/advisories/GHSA-5286-f2rf-35c2).