CVE-2025-53835

XWiki Rendering is vulnerable to XSS attacks through insecure XHTML syntax

Published Jul 14, 2025 CVSS 3.1 · 9.1 Critical EPSS < 1% KEV · Not listed
Description
XWiki Rendering is a generic rendering system that converts textual input in a given syntax (wiki syntax, HTML, etc) into another syntax (XHTML, etc). Starting in version 5.4.5 and prior to version 14.10, the XHTML syntax depended on the `xdom+xml/current` syntax which allows the creation of raw blocks that permit the insertion of arbitrary HTML content including JavaScript. This allows XSS attacks for users who can edit a document like their user profile (enabled by default). This has been fixed in version 14.10 by removing the dependency on the `xdom+xml/current` syntax from the XHTML syntax. Note that the `xdom+xml` syntax is still vulnerable to this attack. As it's main purpose is testing and its use is quite difficult, this syntax shouldn't be installed or used on a regular wiki. There are no known workarounds apart from upgrading.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-21399 XWiki Rendering is vulnerable to XSS attacks through insecure XHTML syntax
Github GHSA Github GHSA GHSA-w3wh-g4m9-783p XWiki Rendering is vulnerable to XSS attacks through insecure XHTML syntax
History
Type Values Removed Values Added
First Time appeared Xwiki xwiki
CPEs cpe:2.3:a:xwiki:xwiki:*:*:*:*:*:*:*:*
Vendors & Products Xwiki xwiki
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Metrics epss

{'score': 0.00579}

Type Values Removed Values Added
Description XWiki Rendering is a generic rendering system that converts textual input in a given syntax (wiki syntax, HTML, etc) into another syntax (XHTML, etc). Starting in version 5.4.5 and prior to version 14.10, the XHTML syntax depended on the `xdom+xml/current` syntax which allows the creation of raw blocks that permit the insertion of arbitrary HTML content including JavaScript. This allows XSS attacks for users who can edit a document like their user profile (enabled by default). This has been fixed in version 14.10 by removing the dependency on the `xdom+xml/current` syntax from the XHTML syntax. Note that the `xdom+xml` syntax is still vulnerable to this attack. As it's main purpose is testing and its use is quite difficult, this syntax shouldn't be installed or used on a regular wiki. There are no known workarounds apart from upgrading.
Title XWiki Rendering is vulnerable to XSS attacks through insecure XHTML syntax
Weaknesses CWE-79
CWE-80
References
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Jul 15, 2025, 7:49 PM
Reserved
Jul 9, 2025, 2:14 PM
Status
Analyzed
Published
Jul 14, 2025, 11:15 PM
Modified
Jun 17, 2026, 9:39 AM