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.
Published:Mar 9, 2026
Last Modified:Apr 16, 2026
EPS:Mar 9, 2026
EPSS Score:0.00033
CVSS Score:4.6
Affected Products
Vendor
Product
Action
Vendor
Flarum
Product
Nicknames
Flarum
Nicknames
Exploits
No exploit reference
Common Weakness Enumeration
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Vulnerability Scoring System
Attack Vector
Network
Adjacent
Local
Physical
Privileges Required
None
Low
High
User Interaction
None
Required
Scope
Unchanged
Changed
Confidentiality
None
Low
High
Integrity
None
Low
High
Availability
None
Low
High
