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    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
    Flarum
    Product
    Nicknames

    Exploits

    No exploit reference

    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