Detections
Analytics
CVE-2026-30913
medium
Description
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.
References
https://github.com/flarum/nicknames/releases/tag/v1.8.
https://github.com/flarum/nicknames/commit/4dde99729abdce8f6e2a7437c86e38735fdcca28
https://github.com/flarum/framework/security/advisories/GHSA-3c4m-j3g4-hh25