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CVE-2025-55166

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Date: August 12, 2025

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.

Severity Score

Related Resources (8)

https://github.com/darylldoyle/svg-sanitizer/security/advisories/GHSA-22wq-q86m-83fh
https://github.com/darylldoyle/svg-sanitizer
https://github.com/darylldoyle/svg-sanitizer/commit/5a0a1eaf0c6b0b540dc945fe30c93cf106b357c1
https://github.com/darylldoyle/svg-sanitizer/commit/0afa95ea74be155a7bcd6c6fb60c276c39984500
https://nvd.nist.gov/vuln/detail/CVE-2025-55166
https://github.com/darylldoyle/svg-sanitizer/releases/tag/0.22.0
https://github.com/darylldoyle/svg-sanitizer/blob/0.21.0/src/Sanitizer.php#L454-L481
https://www.mend.io/vulnerability-database/CVE-2025-55166

Severity Score

Weakness Type (CWE)

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CWE-79

URL Redirection to Untrusted Site ('Open Redirect')

CWE-601

Top Fix

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Upgrade Version

Upgrade to version enshrined/svg-sanitize - 0.22.0

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): REQUIRED
Scope (S): UNCHANGED
Confidentiality (C): LOW
Integrity (I): LOW
Availability (A): NONE

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