GHSA-w3wh-g4m9-783p: org.xwiki.rendering:xwiki-rendering-syntax-xhtml (CVE-2025-53835)

XWiki Rendering is vulnerable to XSS attacks through insecure XHTML syntax

CVSS 9.1 CriticalCriticalEPSS 0.0041 · 35th percentile

Critical, because:

CVSS score 9.1: 9.0 or more.

Published by the GitHub Advisory Database at 14 Jul 2025, 21:40 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

Package	Ecosystem	Affected	Fixed in
org.xwiki.rendering:xwiki-rendering-syntax-xhtml	Maven	>=5.4.5, <14.10	14.10

Identifiers

GHSA-w3wh-g4m9-783p · CVE-2025-53835

Weakness (CWE)

CWE-79 · CWE-80

Machine-written summary

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

XWiki Rendering's xwiki-rendering-syntax-xhtml package, versions 5.4.5 up to but not including 14.10, is vulnerable to cross-site scripting. A user who can edit a document, such as their own user profile, can switch the document's syntax to xdom+xml/current and insert raw HTML containing JavaScript. Upgrade to version 14.10, which removes the dependency; no workaround is listed apart from upgrading.

Written 2 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

Score	Rating	CVSS	Vector	Source
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 0.0041, the 35th percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 14:17 UTC First seen by agentprime
31 Oct 2026, 14:17 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.