CVE-2026-30913

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.

• CWE-79

• 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.
• https://github.com/flarum/framework/security/advisories/GHSA-3c4m-j3g4-hh25

Published

Mar 10, 2026

Last Modified

Jun 17, 2026

Status

Deferred

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
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