{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-30913", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-03-07T16:40:05.883Z", "datePublished": "2026-03-09T22:42:40.014Z", "dateUpdated": "2026-03-10T14:17:30.046Z"}, "containers": {"cna": {"title": "flarum/nickname: Display name injection in notification emails (autolink & markdown)", "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": 4.6, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/flarum/framework/security/advisories/GHSA-3c4m-j3g4-hh25", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/flarum/framework/security/advisories/GHSA-3c4m-j3g4-hh25"}, {"name": "https://github.com/flarum/nicknames/commit/4dde99729abdce8f6e2a7437c86e38735fdcca28", "tags": ["x_refsource_MISC"], "url": "https://github.com/flarum/nicknames/commit/4dde99729abdce8f6e2a7437c86e38735fdcca28"}, {"name": "https://github.com/flarum/nicknames/releases/tag/v1.8.", "tags": ["x_refsource_MISC"], "url": "https://github.com/flarum/nicknames/releases/tag/v1.8."}], "affected": [{"vendor": "flarum", "product": "nicknames", "versions": [{"version": "< 1.8.3", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-03-09T22:42:40.014Z"}, "descriptions": [{"lang": "en", "value": "Flarum is open-source forum software. When the flarum/nicknames extension is enabled, a registered user can set their nickname to a string that email clients interpret as a hyperlink. The nickname is inserted verbatim into plain-text notification emails, and recipients may be misled into visiting attacker-controlled domains."}], "source": {"advisory": "GHSA-3c4m-j3g4-hh25", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/flarum/framework/security/advisories/GHSA-3c4m-j3g4-hh25", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-03-10T14:17:25.125303Z", "id": "CVE-2026-30913", "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": "2026-03-10T14:17:30.046Z"}}]}}

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{"cveTags": [], "descriptions": [{"lang": "en", "value": "Flarum is open-source forum software. When the flarum/nicknames extension is enabled, a registered user can set their nickname to a string that email clients interpret as a hyperlink. The nickname is inserted verbatim into plain-text notification emails, and recipients may be misled into visiting attacker-controlled domains."}], "id": "CVE-2026-30913", "lastModified": "2026-03-10T17:40:15.210", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.6, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.1, "impactScore": 2.5, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-03-10T17:40:15.210", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/flarum/framework/security/advisories/GHSA-3c4m-j3g4-hh25"}, {"source": "security-advisories@github.com", "url": "https://github.com/flarum/nicknames/commit/4dde99729abdce8f6e2a7437c86e38735fdcca28"}, {"source": "security-advisories@github.com", "url": "https://github.com/flarum/nicknames/releases/tag/v1.8."}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}