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TI-2025-33727 Aliases CVE-2025-53835GHSA-w3wh-g4m9-783p

XWiki Rendering is vulnerable to XSS attacks through insecure XHTML syntax

Priority HIGH 74CWE-79Published · Updated

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 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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00408 35th percentileScored 2026-11-07
Fix Fixed xwiki-rendering (xwiki): 14.10org.xwiki.rendering:xwiki-rendering-syntax-xhtml (Maven): 14.10

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

VendorProductAffected versionsFixed inStatusSource
XWikixwiki-rendering5.4.5 to before 14.1014.10Patch availableCNA
—org.xwiki.rendering:xwiki-rendering-syntax-xhtml (Maven)5.4.5 to before 14.1014.10Patch availableGHSA-w3wh-g4m9-783p
  • xwiki-rendering VendorXWiki Affected 5.4.5 to before 14.10 Fixed in 14.10 Patch available CNA
  • org.xwiki.rendering:xwiki-rendering-syntax-xhtml (Maven) Vendor— Affected 5.4.5 to before 14.10 Fixed in 14.10 Patch available GHSA-w3wh-g4m9-783p

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:xwiki:xwiki:*:*:*:*:*:*:*:*5.4.5 to before 14.10VulnerableXWiki
  • cpe:2.3:a:xwiki:xwiki:*:*:*:*:*:*:*:* Versions 5.4.5 to before 14.10 Vulnerable ·XWiki

Remediation

  • Fix · CNA xwiki-rendering (xwiki) Fixed in 14.10
  • Fix · GHSA-w3wh-g4m9-783p org.xwiki.rendering:xwiki-rendering-syntax-xhtml (Maven) Fixed in 14.10 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-53835
  2. 2026-10-03 Alias added: GHSA-w3wh-g4m9-783p

References

Patch 2

Advisory 1

Other 2

  • 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