CVE-2026-30913

Published: Mar 10, 2026Modified: Jun 17, 2026Deferred

4.6

Vector

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

Exploitability: 2.1 / Impact: 2.5

Source: security-advisories@github.com (Secondary)

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.

Related CWEs

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

References (4)

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

Source: security-advisories@github.com

https://github.com/flarum/nicknames/commit/4dde99729abdce8f6e2a7437c86e38735fdcca28

Source: security-advisories@github.com

https://github.com/flarum/nicknames/releases/tag/v1.8.

Source: security-advisories@github.com

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

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Timeline

No history available yet.