CVE-2026-30913
flarum/nickname: Display name injection in notification emails (autolink & markdown)
CVSS Score
4.6
EPSS Score
0.0%
EPSS Percentile
0th
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 | CWE-79 |
| Vendor | flarum |
| Product | nicknames |
| Published | Mar 9, 2026 |
| Last Updated | Mar 10, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
flarum / nicknames
< 1.8.3