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Advisory record · GHSA-8g2j-rhfh-hq3r

org.xwiki.contrib.markdown:syntax-markdown-commonmark12 vulnerable to XSS via Markdown content

CVSS 9.1 CriticalCriticalEPSS 0.0049 · 42nd percentile

Critical, because:

  • CVSS score 9.1: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 30 Apr 2025, 16:53 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.xwiki.contrib.markdown:syntax-markdown-commonmark12Maven>=8.2, <8.98.9
Identifiers
GHSA-8g2j-rhfh-hq3r · CVE-2025-46558
Weakness (CWE)
CWE-79
Tags
Published
30 Apr 2025
Updated
1 May 2025

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

The org.xwiki.contrib.markdown:syntax-markdown-commonmark12 package, versions 8.2 up to but not including 8.9, is vulnerable to cross-site scripting through Markdown content. A user without script rights can embed JavaScript that runs in the browser of anyone who views the affected document or comment, and if an administrator or user with programming rights runs it, the whole XWiki installation can be compromised. Upgrade to version 8.9. The source lists no workaround other than upgrading.

Written 7 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
9.1 Critical 3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0049, the 42nd percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 15:11 UTC First seen by agentprime
  2. 31 Oct 2026, 15:11 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.