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CVE-2025-55166— svg-sanitizer By-Passing Attribute Sanitization

Quick assessment

Affected
darylldoyle svg-sanitizer
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.

svg-sanitizer是Daryll Doyle个人开发者的一款SVG格式文件清洗工具。 svg-sanitizer 0.22.0之前版本存在输入验证错误漏洞，该漏洞源于cleanXlinkHrefs方法仅搜索小写属性名，可能导致跨站脚本或外部域链接。

AI Predicted 6.1 Difficulty: Easy EPSS 0.45% · P37

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise
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I. Basic Information for CVE-2025-55166

Vulnerability Information
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Vulnerability Title
svg-sanitizer By-Passing Attribute Sanitization
Source: CVE Program / CVE List V5
Vulnerability Description
savg-sanitizer is a PHP SVG/XML sanitizer. Prior to version 0.22.0, the sanitization logic in the cleanXlinkHrefs method only searches for lower-case attribute name, which allows to by-pass the isHrefSafeValue check. As a result this allows cross-site scripting or linking to external domains. This issue has been patched in version 0.22.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/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
svg-sanitizer 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
svg-sanitizer是Daryll Doyle个人开发者的一款SVG格式文件清洗工具。 svg-sanitizer 0.22.0之前版本存在输入验证错误漏洞，该漏洞源于cleanXlinkHrefs方法仅搜索小写属性名，可能导致跨站脚本或外部域链接。
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
darylldoyle svg-sanitizer < 0.22.0 -

II. Public POCs for CVE-2025-55166

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III. Intelligence Information for CVE-2025-55166

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Patches & Fixes for CVE-2025-55166 (1)

Vendor Advisories for CVE-2025-55166 (1)

IV. Related Vulnerabilities

Same product: svg-sanitizer
Same vendor: darylldoyle
Same weakness: CWE-79

V. Comments for CVE-2025-55166

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