Cross-site Scripting in org.xwiki.commons:xwiki-commons-xml

Exploitation

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

CVSS

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

EPSS

• CVE-2023-29528: 1.28% estimated exploitation activity in the next 30 days; percentile 69.99 (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 The "restricted" mode of the HTML cleaner in XWiki, introduced in version 4.2-milestone-1 and massively improved in version 14.6-rc-1, allowed the injection of arbitrary HTML code and thus cross-site scripting via invalid HTML comments. As a consequence, any code relying on this "restricted" mode for security is vulnerable to JavaScript injection ("cross-site scripting"/XSS). An example are anonymous comments in XWiki where the HTML macro filters HTML using restricted mode: When a privileged user with programming rights visits such a comment in XWiki, the malicious JavaScript code is executed in the context of the user session. This allows server-side code execution with programming rights, impacting the confidentiality, integrity and availability of the XWiki instance. Note that while all versions since 4.2-milestone-1 should be vulnerable, only starting with version 14.6-rc-1 the HTML comment is necessary for the attack to succeed due to another vulnerability that has been…

Published by the source

20 Apr 2023, 20:55 UTC

Last modified by the source

4 Nov 2023, 05:05 UTC

Source last checked

26 Oct 2026, 16:16 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-x37v-36wv-6v6h

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# Patch Next advisory brief: CVE-2023-29528

Advisory: Cross-site Scripting in org.xwiki.commons:xwiki-commons-xml
IDs: CVE-2023-29528, GHSA-x37v-36wv-6v6h
Record: https://patchnext.com/advisories/cve-2023-29528 (revision 1, source checked 26 Oct 2026, 16:16 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Critical (CVSS 9.0)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: org.xwiki.commons:xwiki-commons-xml 14.10. A vendor fix does not mean a deployment is fixed.

## Affected components
- Maven org.xwiki.commons:xwiki-commons-xml: affected >= 4.2-milestone-1, < 14.10; fixed in 14.10

## Suggested inspection (read-only)
- Maven org.xwiki.commons:xwiki-commons-xml: 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.commons:xwiki-commons-xml.
- 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-x37v-36wv-6v6h (GitHub-reviewed advisory GHSA-x37v-36wv-6v6h lists affected ranges: Maven org.xwiki.commons:xwiki-commons-xml >=4.2-milestone-1 <14.10)

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