XWiki CKEditor.HTMLConverter vulnerable to Remote Code Execution via Cross-Site Request Forgery

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-2023-22457: 19.28% estimated exploitation activity in the next 30 days; percentile 97.34 (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 CKEditor.HTMLConverter document lacked a protection against Cross-Site Request Forgery (CSRF), allowing to execute macros with the rights of the current user. If a privileged user with programming rights was tricked into executing a GET request to this document with certain parameters (e.g., via an image with a corresponding URL embedded in a comment or via a redirect), this would allow arbitrary remote code execution and the attacker could gain rights, access private information or impact the availability of the wiki. The attack can be demonstrated by accessing the URL <server/xwiki/bin/view/Main?sheet=CKEditor.HTMLConverter&language=en&sourceSyntax=xwiki%2F2.1&stripHTMLEnvelope=true&fromHTML=false&toHTML=true&text=%7B%7Bgroovy%7D%7Dprintln%28%22Hello+from+Groovy%21%22%29%7B%7B%2Fgroovy%7D%7D where <server is the URL of the XWiki installation as a user with programming rights. If this displays the text "Hello from Groovy!", the installation is vulnerable. Patches The…

Published by the source

6 Jan 2023, 17:15 UTC

Last modified by the source

3 Feb 2023, 05:01 UTC

Source last checked

26 Oct 2026, 16:10 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-6mjp-2rm6-9g85

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# Patch Next advisory brief: CVE-2023-22457

Advisory: XWiki CKEditor.HTMLConverter vulnerable to Remote Code Execution via Cross-Site Request Forgery
IDs: CVE-2023-22457, GHSA-6mjp-2rm6-9g85
Record: https://patchnext.com/advisories/cve-2023-22457 (revision 1, source checked 26 Oct 2026, 16:10 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.contrib:application-ckeditor-ui 1.64.3. A vendor fix does not mean a deployment is fixed.

## Affected components
- Maven org.xwiki.contrib:application-ckeditor-ui: affected < 1.64.3; fixed in 1.64.3

## Suggested inspection (read-only)
- Maven org.xwiki.contrib:application-ckeditor-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.contrib:application-ckeditor-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-6mjp-2rm6-9g85 (GitHub-reviewed advisory GHSA-6mjp-2rm6-9g85 lists affected ranges: Maven org.xwiki.contrib:application-ckeditor-ui >=0 <1.64.3)

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