Vulnerability 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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/flarum/framework/security/advisories/GHSA-3c4m-j3g4-hh25
- https://github.com/flarum/nicknames/commit/4dde99729abdce8f6e2a7437c86e38735fdcc
- https://github.com/flarum/nicknames/releases/tag/v1.8.
- https://github.com/flarum/framework/security/advisories/GHSA-3c4m-j3g4-hh25
FAQ
What is CVE-2026-30913?
CVE-2026-30913 is a vulnerability with a CVSS score of 4.6 (MEDIUM). 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 ...
How severe is CVE-2026-30913?
CVE-2026-30913 has been rated MEDIUM with a CVSS base score of 4.6/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-30913?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.