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CVE-2025-52561— HTMLSanitizer.jl Possible XSS

Quick assessment

Affected
JuliaComputing HTMLSanitizer.jl
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

HTMLSanitizer是JuliaHub开源的一个HTML格式化软件。 HTMLSanitizer 0.2.1之前版本存在跨站脚本漏洞，该漏洞源于style标签内容未正确转义导致跨站脚本攻击。

AI Predicted 6.4 Difficulty: Moderate EPSS 0.74% · P52

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2025-52561

Vulnerability Information
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Vulnerability Title
HTMLSanitizer.jl Possible XSS
Source: CVE Program / CVE List V5
Vulnerability Description
HTMLSanitizer.jl is a Whitelist-based HTML sanitizer. Prior to version 0.2.1, when adding the style tag to the whitelist, content inside the tag is incorrectly unescaped, and closing tags injected as content are interpreted as real HTML, enabling tag injection and JavaScript execution. This could result in possible cross-site scripting (XSS) in any HTML that is sanitized with this library. This issue has been patched in version 0.2.1. A workaround involves adding the math and svg elements to the whitelist manually.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N
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
HTMLSanitizer 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
HTMLSanitizer是JuliaHub开源的一个HTML格式化软件。 HTMLSanitizer 0.2.1之前版本存在跨站脚本漏洞，该漏洞源于style标签内容未正确转义导致跨站脚本攻击。
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)

Affected Products

Vendor Product Affected Versions CPE Subscribe
JuliaComputing HTMLSanitizer.jl < 0.2.1 -

II. Public POCs for CVE-2025-52561

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III. Intelligence Information for CVE-2025-52561

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IV. Related Vulnerabilities

Same weakness: CWE-79

V. Comments for CVE-2025-52561

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