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Status published
Medium
CVE-2025-55166
svg-sanitizer By-Passing Attribute Sanitization
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.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
More from darylldoyle
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darylldoyle
View all reports →Affected Software
svg-sanitizer
Vulnerable Versions:
< 0.22.0
Timeline
Official Publish:
August 12th, 2025
Last Modified:
August 12th, 2025
Added to House:
July 22nd, 2026
CVSS Vectors
MITRE ATT&CK TTPs
T1189
Drive-by Compromise
Initial Access
T1059.007
JavaScript
Execution
T1539
Steal Web Session Cookie
Collection
T1213
Data from Information Repositories
Collection
T1567
Exfiltration Over Web Service
Exfiltration
T1491.001
Defacement
Impact
T1566
Phishing
Initial Access
T1204
User Execution
Execution
T1071
Application Layer Protocol
Command and Control
T1036
Masquerading
Defense Evasion