{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-41661", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-04-21T23:58:43.803Z", "datePublished": "2026-05-07T02:59:34.649Z", "dateUpdated": "2026-05-07T02:59:34.649Z"}, "containers": {"cna": {"title": "Admidio: Reflected XSS in msg_window.php via Square Bracket to HTML Tag Conversion", "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": 6.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/Admidio/admidio/security/advisories/GHSA-gq27-fc8w-vcmp", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/Admidio/admidio/security/advisories/GHSA-gq27-fc8w-vcmp"}, {"name": "https://github.com/Admidio/admidio/releases/tag/v5.0.9", "tags": ["x_refsource_MISC"], "url": "https://github.com/Admidio/admidio/releases/tag/v5.0.9"}], "affected": [{"vendor": "Admidio", "product": "admidio", "versions": [{"version": "< 5.0.9", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-07T02:59:34.649Z"}, "descriptions": [{"lang": "en", "value": "Admidio is an open-source user management solution. Prior to version 5.0.9, an unauthenticated attacker can execute arbitrary JavaScript in any Admidio user's browser through a reflected XSS in system/msg_window.php. The endpoint passes user input through htmlspecialchars(), which does not encode square brackets. A subsequent call to Language::prepareTextPlaceholders() converts those brackets into HTML angle brackets, producing executable markup. This issue has been patched in version 5.0.9."}], "source": {"advisory": "GHSA-gq27-fc8w-vcmp", "discovery": "UNKNOWN"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "Admidio is an open-source user management solution. Prior to version 5.0.9, an unauthenticated attacker can execute arbitrary JavaScript in any Admidio user's browser through a reflected XSS in system/msg_window.php. The endpoint passes user input through htmlspecialchars(), which does not encode square brackets. A subsequent call to Language::prepareTextPlaceholders() converts those brackets into HTML angle brackets, producing executable markup. This issue has been patched in version 5.0.9."}], "id": "CVE-2026-41661", "lastModified": "2026-05-07T04:16:29.920", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 2.7, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-05-07T04:16:29.920", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/Admidio/admidio/releases/tag/v5.0.9"}, {"source": "security-advisories@github.com", "url": "https://github.com/Admidio/admidio/security/advisories/GHSA-gq27-fc8w-vcmp"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,5.0.9)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "admidio", "source": "cna", "vendor": "Admidio"}, "product": "admidio", "vendor": "admidio"}], "created": "2026-05-07T05:30:22.202811+00:00", "updated": "2026-05-07T05:30:22.646679+00:00", "vendors": ["admidio", "admidio$PRODUCT$admidio"]}