org.xwiki.platform:xwiki-platform-legacy-notification-activitymacro Eval Injection vulnerability

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-2023-29209: 1.14% estimated exploitation activity in the next 30 days; percentile 66.76 (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 Any user with view rights on commonly accessible documents including the legacy notification activity macro can execute arbitrary Groovy, Python or Velocity code in XWiki leading to full access to the XWiki installation. The root cause is improper escaping of the macro parameters of the legacy notification activity macro. This macro is installed by default in XWiki. A proof of concept exploit is If the output of this macro is or similar, the XWiki installation is vulnerable. The vulnerability can be exploited via every wiki page that is editable including the user's profile, but also with just view rights using the HTMLConverter that is part of the CKEditor integration which is bundled with XWiki. Patches The vulnerability has been patched in XWiki 13.10.11, 14.4.7 and 14.10. Workarounds The issue can be fixed by replacing the code of the legacy notification activity macro by the patched version. Alternatively, if the macro isn't used, the document…

Published by the source

12 Apr 2023, 20:35 UTC

Last modified by the source

25 Apr 2023, 21:00 UTC

Source last checked

26 Oct 2026, 16:11 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-9pc2-x9qf-7j2q

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# Patch Next advisory brief: CVE-2023-29209

Advisory: org.xwiki.platform:xwiki-platform-legacy-notification-activitymacro Eval Injection vulnerability
IDs: CVE-2023-29209, GHSA-9pc2-x9qf-7j2q
Record: https://patchnext.com/advisories/cve-2023-29209 (revision 1, source checked 26 Oct 2026, 16:11 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-legacy-notification-activitymacro 14.10, 14.4.7, 13.10.11. A vendor fix does not mean a deployment is fixed.

## Affected components
- Maven org.xwiki.platform:xwiki-platform-legacy-notification-activitymacro: affected >= 10.9, < 13.10.11; >= 14.0-rc-1, < 14.4.7; >= 14.5, < 14.10; fixed in 14.10, 14.4.7, 13.10.11

## Suggested inspection (read-only)
- Maven org.xwiki.platform:xwiki-platform-legacy-notification-activitymacro: 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-legacy-notification-activitymacro.
- 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-9pc2-x9qf-7j2q (GitHub-reviewed advisory GHSA-9pc2-x9qf-7j2q lists affected ranges: Maven org.xwiki.platform:xwiki-platform-legacy-notification-activitymacro >=10.9 =14.0-rc-1 =14.5 <14.10)

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