TI-2025-29275 Aliases CVE-2025-46558 GHSA-8g2j-rhfh-hq3r

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

HIGH 74CWE-79Published 2025-04-30 · Updated 2025-04-30

Key facts

Attack vector: Network
Privileges required: Low
User interaction: Required
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.

Summary

XWiki Contrib's Syntax Markdown allows importing Markdown content into wiki pages and creating wiki content in Markdown. In versions starting from 8.2 to before 8.9, the Markdown syntax is vulnerable to cross-site scripting (XSS) through HTML. In particular, using Markdown syntax, it's possible for any user to embed Javascript code that will then be executed on the browser of any other user visiting either the document or the comment that contains it. In the instance that this code is executed by a user with admins or programming rights, this issue compromises the confidentiality, integrity and availability of the whole XWiki installation. This issue has been patched in version 8.9.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00486 42nd percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed syntax-markdown (xwiki-contrib): 8.9org.xwiki.contrib.markdown:syntax-markdown-commonmark12 (Maven): 8.9

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
XWiki	syntax-markdown	8.2 to before 8.9	8.9	Patch available	CNA
—	org.xwiki.contrib.markdown:syntax-markdown-commonmark12 (Maven)	8.2 to before 8.9	8.9	Patch available	GHSA-8g2j-rhfh-hq3r

syntax-markdown VendorXWiki Affected 8.2 to before 8.9 Fixed in 8.9 Patch available CNA
org.xwiki.contrib.markdown:syntax-markdown-commonmark12 (Maven) Vendor— Affected 8.2 to before 8.9 Fixed in 8.9 Patch available GHSA-8g2j-rhfh-hq3r

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:xwiki:xwiki::::::::	8.2 to before 8.9	Vulnerable	XWiki

cpe:2.3:a:xwiki:xwiki:*:*:*:*:*:*:*:* Versions 8.2 to before 8.9 Vulnerable ·XWiki

Remediation

Fix · CNA syntax-markdown (xwiki-contrib) Fixed in 8.9
Fix · GHSA-8g2j-rhfh-hq3r org.xwiki.contrib.markdown:syntax-markdown-commonmark12 (Maven) Fixed in 8.9 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2025-46558
2026-10-03 Alias added: GHSA-8g2j-rhfh-hq3r

References

Exploit 1

https://jira.xwiki.org/browse/MARKDOWN-80

Patch 2

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2025-46558

Other 1

https://github.com/xwiki-contrib/syntax-markdown

TI-2025-18595 Remote code execution as guest via SolrSearchMacros request in xwiki KEVCVSS 3.1CRITICAL 9.8
TI-2023-25214 Remote code execution through the section parameter in Administration as guest in XWiki Platform CVSS 3.1CRITICAL 10.0
TI-2025-23500 XWiki Platform vulnerable to SQL injection through getdeleteddocuments.vm template sort parameter CVSS 4.0CRITICAL 9.3
TI-2025-23979 org.xwiki.platform:xwiki-platform-rest-server allows SQL injection in query endpoint of REST API CVSS 4.0CRITICAL 9.3
TI-2024-20829 XWiki Platform: Remote code execution from account via SearchSuggestSourceSheet CVSS 3.1CRITICAL 10.0
TI-2024-14375 XWiki Remote Code Execution vulnerability via user registration CVSS 3.1CRITICAL 10.0

See all 247 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences