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CVE-2026-30913

MEDIUM

4.6

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.

CVE Details

CVSS v3.1 Score4.6

SeverityMEDIUM

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredLOW

User InteractionREQUIRED

Published3/10/2026

Last Modified3/11/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-79

References

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

https://github.com/flarum/nicknames/commit/4dde99729abdce8f6e2a7437c86e38735fdcca28(security-advisories@github.com)

https://github.com/flarum/nicknames/releases/tag/v1.8.(security-advisories@github.com)

https://github.com/flarum/framework/security/advisories/GHSA-3c4m-j3g4-hh25(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

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