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CVE-2025-53835— XWiki Rendering is vulnerable to XSS attacks through insecure XHTML syntax

Quick assessment

Affected
xwiki xwiki-rendering
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

XWiki Rendering是XWiki基金会的一个通用渲染系统，它将给定语法（wiki 语法、HTML 等）中的文本输入转换为另一种语法（XHTML 等）。 XWiki Rendering 5.4.5至14.10之前版本存在安全漏洞，该漏洞源于XHTML语法依赖xdom+xml/current语法，可能导致跨站脚本攻击。

CVSS 9.1 · Critical EPSS 0.38% · P30
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I. Basic Information for CVE-2025-53835

Vulnerability Information
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Vulnerability Title
XWiki Rendering is vulnerable to XSS attacks through insecure XHTML syntax
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
XWiki Rendering 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
XWiki Rendering是XWiki基金会的一个通用渲染系统，它将给定语法（wiki 语法、HTML 等）中的文本输入转换为另一种语法（XHTML 等）。 XWiki Rendering 5.4.5至14.10之前版本存在安全漏洞，该漏洞源于XHTML语法依赖xdom+xml/current语法，可能导致跨站脚本攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
xwiki xwiki-rendering >= 5.4.5, < 14.10 -

II. Public POCs for CVE-2025-53835

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 7029 chars
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III. Intelligence Information for CVE-2025-53835

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Patches & Fixes for CVE-2025-53835 (1)

Vendor Advisories for CVE-2025-53835 (1)

IV. Related Vulnerabilities

Same product: xwiki-rendering
Same vendor: xwiki
Same weakness: CWE-79

V. Comments for CVE-2025-53835

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