GHSA-r5vh-gc3r-r24w

Source
https://github.com/advisories/GHSA-r5vh-gc3r-r24w
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/04/GHSA-r5vh-gc3r-r24w/GHSA-r5vh-gc3r-r24w.json
Aliases
Published
2024-04-10T17:14:59Z
Modified
2024-04-10T22:01:48Z
Summary
XWiki Platform CSRF remote code execution through the realtime HTML Converter API
Details

Impact

When the realtime editor is installed in XWiki, it allows arbitrary remote code execution with the interaction of an admin user with programming right. More precisely, by getting an admin user to either visit a crafted URL or to view an image with this URL that could be in a comment, the attacker can get the admin to execute arbitrary XWiki syntax including scripting macros with Groovy or Python code. This compromises the confidentiality, integrity and availability of the whole XWiki installation.

To reproduce on an XWiki installation, as an admin, click on <xwiki-host>/xwiki/bin/get/RTFrontend/ConvertHTML?wiki=xwiki&space=Main&page=WebHome&text=%7B%7Bvelocity%7D%7D%24logtool.error%28%22Hello%20from%20Velocity%20%21%22%29%7B%7B%2Fvelocity%7D%7D. If the error "Hello from Velocity!" gets logged then the installation is vulnerable.

Patches

This vulnerability has been patched in XWiki 14.10.19, 15.5.4 and 15.9.

Workarounds

Update RTFrontend.ConvertHTML following this patch. This will, however, break some synchronization processes in the realtime editor, so upgrading should be the preferred way on installations where this editor is used.

References

  • https://jira.xwiki.org/browse/XWIKI-21424
  • https://github.com/xwiki/xwiki-platform/commit/4896712ee6483da623f131be2e618f1f2b79cb8d
References

Affected packages

Maven / org.xwiki.platform:xwiki-platform-realtime-ui

Package

Name
org.xwiki.platform:xwiki-platform-realtime-ui

Affected ranges

Type
ECOSYSTEM
Events
Introduced
13.9-rc-1
Fixed
14.10.19

Maven / org.xwiki.platform:xwiki-platform-realtime-ui

Package

Name
org.xwiki.platform:xwiki-platform-realtime-ui

Affected ranges

Type
ECOSYSTEM
Events
Introduced
15.0-rc-1
Fixed
15.5.4

Maven / org.xwiki.platform:xwiki-platform-realtime-ui

Package

Name
org.xwiki.platform:xwiki-platform-realtime-ui

Affected ranges

Type
ECOSYSTEM
Events
Introduced
15.6-rc-1
Fixed
15.9