CVE-2026-111896: Collapse of Data into Unsafe Value in thorsten phpMyFAQ
Description
phpMyFAQ versions from 4.2.0-alpha up to but not including 4.2.0-beta contain a stored cross-site scripting (XSS) vulnerability in the SvgSanitizer component. This flaw allows FAQ editors to store executable SVG files by exploiting how script tags can be split around removed tokens, leading to script execution in the application's origin when the file is viewed.
CVSS v4.0
Score 5.1medium
Affected software
thorsten
phpMyFAQ
pkg:github/thorsten/phpMyFAQRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in phpMyFAQ's SvgSanitizer component affects versions >=4.2.0-alpha and <4.2.0-beta. It is a stored cross-site scripting issue where attackers can craft SVG files with script tags split around tokens removed by the sanitizer, such as processing instructions. This bypass allows the reassembly of executable script code during a single-pass removal process, resulting in script execution in the context of the application when a victim opens the malicious SVG file.
Potential Impact
Successful exploitation enables an attacker with FAQ editor privileges to store malicious SVG content that executes scripts in the application's origin. This can lead to cross-site scripting attacks affecting users who view the stored SVG, potentially compromising user sessions or performing unauthorized actions within the application context.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict FAQ editor privileges to trusted users and avoid opening SVG files from untrusted sources within the application.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-10-17T12:16:44.850Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ad3c6d02cdf04f6565207fe
Added to database: 10/17/2026, 19:04:48 UTC
Last enriched: 10/17/2026, 19:19:42 UTC
Last updated: 10/17/2026, 22:21:03 UTC
Views: 5
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