XWiki allows remote code execution through the extension sheet

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

9.9 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS

• CVE-2024-55662: 0.79% estimated exploitation activity in the next 30 days; percentile 56.16 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Impact On instances where Extension Repository Application is installed, any user can execute any code requiring programming rights on the server. In order to reproduce on an instance, as a normal user without script nor programming rights, go to your profile and add an object of type ExtensionCode.ExtensionClass. Set the description to {{async}}{{groovy}}println("Hello from Description"){{/groovy}}{{/async}} and press Save and View. If the description displays as Hello from Description without any error, then the instance is vulnerable. Patches This vulnerability has been fixed in XWiki 15.10.9 and 16.3.0. Workarounds Since Extension Repository Application is not mandatory, it can be safely disabled on instances that do not use it. It is also possible to manually apply this patch to the page ExtensionCode.ExtensionSheet, as well as this patch to the page ExtensionCode.ExtensionAuthorsDisplayer. References https://jira.xwiki.org/browse/XWIKI-21890…

Published by the source

12 Dec 2024, 19:23 UTC

Last modified by the source

30 Apr 2025, 20:39 UTC

Source last checked

26 Oct 2026, 16:35 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-j2pq-22jj-4pm5

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# Patch Next advisory brief: CVE-2024-55662

Advisory: XWiki allows remote code execution through the extension sheet
IDs: CVE-2024-55662, GHSA-j2pq-22jj-4pm5
Record: https://patchnext.com/advisories/cve-2024-55662 (revision 1, source checked 26 Oct 2026, 16:35 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Critical (CVSS 9.9)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: org.xwiki.platform:xwiki-platform-repository-server-ui 16.3.0, 15.10.9. A vendor fix does not mean a deployment is fixed.

## Affected components
- Maven org.xwiki.platform:xwiki-platform-repository-server-ui: affected >= 3.3-milestone-1, < 15.10.9; >= 16.0.0-rc-1, < 16.3.0; fixed in 15.10.9, 16.3.0

## Suggested inspection (read-only)
- Maven org.xwiki.platform:xwiki-platform-repository-server-ui: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on org.xwiki.platform:xwiki-platform-repository-server-ui.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-j2pq-22jj-4pm5 (GitHub-reviewed advisory GHSA-j2pq-22jj-4pm5 lists affected ranges: Maven org.xwiki.platform:xwiki-platform-repository-server-ui >=3.3-milestone-1 =16.0.0-rc-1 <16.3.0)

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