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Security Advisories: GSA_kwCzR0hTQS1yNXZoLWdjM3ItcjI0d84AA63v

XWiki Platform CSRF remote code execution through the realtime HTML Converter API

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

Permalink: https://github.com/advisories/GHSA-r5vh-gc3r-r24w
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS1yNXZoLWdjM3ItcjI0d84AA63v
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Critical
Classification: General
Published: 23 days ago
Updated: 23 days ago

CVSS Score: 9.7
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Identifiers: GHSA-r5vh-gc3r-r24w, CVE-2024-31988
References:

• https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-r5vh-gc3r-r24w
• https://github.com/xwiki/xwiki-platform/commit/4896712ee6483da623f131be2e618f1f2b79cb8d
• https://github.com/xwiki/xwiki-platform/commit/9f8cc88497418750b09ce9fde5d67d840f038fbf
• https://github.com/xwiki/xwiki-platform/commit/d88da4572fb7d4f95e1f54bb0cce33fce3df08d9
• https://github.com/xwiki/xwiki-platform/commit/d9f5043da289ff106f08e23576746fd8baf98794
• https://jira.xwiki.org/browse/XWIKI-21424
• https://nvd.nist.gov/vuln/detail/CVE-2024-31988
• https://github.com/advisories/GHSA-r5vh-gc3r-r24w

Repository: https://github.com/xwiki/xwiki-platform
Blast Radius: 1.0

Affected Packages