CVE-2026-34974

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-34974", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-03-31T19:38:31.616Z", "datePublished": "2026-04-02T14:48:22.619Z", "dateUpdated": "2026-04-02T16:22:14.990Z"}, "containers": {"cna": {"title": "phpMyFAQ: SVG Sanitizer Bypass via HTML Entity Encoding leads to Stored XSS and Privilege Escalation", "problemTypes": [{"descriptions": [{"cweId": "CWE-79", "lang": "en", "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-5crx-pfhq-4hgg", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-5crx-pfhq-4hgg"}, {"name": "https://github.com/thorsten/phpMyFAQ/releases/tag/4.1.1", "tags": ["x_refsource_MISC"], "url": "https://github.com/thorsten/phpMyFAQ/releases/tag/4.1.1"}], "affected": [{"vendor": "thorsten", "product": "phpMyFAQ", "versions": [{"version": "< 4.1.1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-04-02T14:48:22.619Z"}, "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."}], "source": {"advisory": "GHSA-5crx-pfhq-4hgg", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-5crx-pfhq-4hgg", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-04-02T16:16:00.518178Z", "id": "CVE-2026-34974", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-02T16:22:14.990Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-34974", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-04-02T16:16:00.518178Z"}}}], "references": [{"url": "https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-5crx-pfhq-4hgg", "tags": ["exploit"]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-04-02T16:16:25.283Z"}}], "cna": {"title": "phpMyFAQ: SVG Sanitizer Bypass via HTML Entity Encoding leads to Stored XSS and Privilege Escalation", "source": {"advisory": "GHSA-5crx-pfhq-4hgg", "discovery": "UNKNOWN"}, "metrics": [{"cvssV3_1": {"scope": "CHANGED", "version": "3.1", "baseScore": 5.4, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}}], "affected": [{"vendor": "thorsten", "product": "phpMyFAQ", "versions": [{"status": "affected", "version": "< 4.1.1"}]}], "references": [{"url": "https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-5crx-pfhq-4hgg", "name": "https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-5crx-pfhq-4hgg", "tags": ["x_refsource_CONFIRM"]}, {"url": "https://github.com/thorsten/phpMyFAQ/releases/tag/4.1.1", "name": "https://github.com/thorsten/phpMyFAQ/releases/tag/4.1.1", "tags": ["x_refsource_MISC"]}], "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."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-79", "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-04-02T14:48:22.619Z"}}}, "cveMetadata": {"cveId": "CVE-2026-34974", "state": "PUBLISHED", "dateUpdated": "2026-04-02T16:22:14.990Z", "dateReserved": "2026-03-31T19:38:31.616Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-04-02T14:48:22.619Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"product": "phpMyFAQ", "vendor": "thorsten", "versions": [{"status": "affected", "version": "< 4.1.1"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:phpmyfaq:phpmyfaq:*:*:*:*:*:*:*:*", "matchCriteriaId": "407BB5BA-44EA-49EB-8072-4ACD67864598", "versionEndExcluding": "4.1.1", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "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."}, {"lang": "es", "value": "phpMyFAQ es una aplicaci\u00f3n web de preguntas frecuentes de c\u00f3digo abierto. Antes de la versi\u00f3n 4.1.1, el saneador de SVG basado en expresiones regulares en phpMyFAQ (SvgSanitizer.php) puede ser eludido utilizando codificaci\u00f3n de entidades HTML en URLs de tipo javascript: dentro de atributos <a href> de SVG. Cualquier usuario con permiso edit_faq puede subir un SVG malicioso que ejecuta JavaScript arbitrario al ser visualizado, permitiendo la escalada de privilegios de editor a una toma de control total de administrador. Este problema ha sido parcheado en la versi\u00f3n 4.1.1."}], "id": "CVE-2026-34974", "lastModified": "2026-07-24T21:10:00.143", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.3, "impactScore": 2.7, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-34974", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-04-02T16:16:00.518178Z", "version": "2.0.3"}}]}, "published": "2026-04-02T15:16:51.903", "references": [{"source": "security-advisories@github.com", "tags": ["Product"], "url": "https://github.com/thorsten/phpMyFAQ/releases/tag/4.1.1"}, {"source": "security-advisories@github.com", "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"], "url": "https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-5crx-pfhq-4hgg"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,4.1.1)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "phpMyFAQ", "source": "cna", "vendor": "thorsten"}, "product": "phpmyfaq", "vendor": "thorsten"}], "analysis": {"en": {"generated_at": "2026-04-06T19:42:55.258498+00:00", "value": {"mitigation_remediation": ["Upgrade phpMyFAQ to version 4.1.1 or newer, which contains the fixed SVG sanitizer.", "If an immediate upgrade is not feasible, disable or restrict SVG uploads for users with edit_faq permission, or remove the offending SVG files from the FAQ database.", "Continuously monitor for suspicious SVG uploads and validate uploaded content against a tight whitelist."], "summary": {"action": "Immediate Patch", "impact": "Stored XSS enabling privilege escalation"}, "threat_synthesis": {"affected_systems": "The vulnerability affects the open source FAQ application phpMyFAQ (developed by thorsten) prior to version 4.1.1. Versions 4.1.1 and later contain the patch that fixes the sanitizer bypass.", "description_and_impact": "A regex-based SVG sanitizer in phpMyFAQ can be bypassed using HTML entity encoding inside javascript: URLs within SVG <a href> attributes. This allows an attacker who can upload an SVG as an editor to execute arbitrary JavaScript in the context of FAQ viewers, leading to stored cross\u2011site scripting and a privilege escalation from editor to administrator.", "risk_and_exploitability": "The flaw has a CVSS score of 5.4, indicating moderate severity, and an EPSS score of less than 1%, suggesting low likelihood of exploitation. It is not listed in CISA\u2019s KEV catalog. An attacker must be able to upload SVG content with edit_faq permission, meaning the attack vector is an authenticated internal attacker. When successful, the attacker can run arbitrary code and elevate privileges to full administrator."}}}}, "created": "2026-04-02T20:11:37.266273+00:00", "updated": "2026-04-07T07:56:09.857166+00:00", "vendors": ["thorsten", "thorsten$PRODUCT$phpmyfaq"]}