CVE-2026-30913

flarum/nickname: Display name injection in notification emails (autolink & markdown)

CVSS 4.6 MEDIUMEPSS 0.2%CWE-79

Vexday Risk Score

13Bajo

Decisión SSVC (CISA)

Track

Sin señal de explotación → monitorear

CVSS 4.6EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Ciclo de vida

09 mar 2026Publicada en NVD

Recomendación: Monitorear — sin señal de explotación por ahora.

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.

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N

Productos afectados

flarum · nicknames

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Referencias

https://github.com/flarum/framework/security/advisories/GHSA-3c4m-j3g4-hh25 https://github.com/flarum/nicknames/commit/4dde99729abdce8f6e2a7437c86e38735fdcca28 https://github.com/flarum/nicknames/releases/tag/v1.8.