CVE Feed

    Dashboard / CVE / CVE-2024-21641

    CVE-2024-21641

    Flarum is open source discussion platform software. Prior to version 1.8.5, the Flarum `/logout` route includes a redirect parameter that allows any third party to redirect users from a (trusted) domain of the Flarum installation to redirect to any link. For logged-in users, the logout must be confirmed. Guests are immediately redirected. This could be used by spammers to redirect to a web address using a trusted domain of a running Flarum installation. The vulnerability has been fixed and published as flarum/core v1.8.5. As a workaround, some extensions modifying the logout route can remedy this issue if their implementation is safe.

    Published:Jan 5, 2024
    Last Modified:Jun 3, 2025
    EPS:Jan 5, 2024
    EPSS Score:0.39798
    CVSS Score:6.5

    Affected Products

    Vendor
    Flarum
    Product
    Flarum

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-178 Cross-Site Flashing

    Related CVEs

    CVE-2026-39924 (CVSS 7.6) — Flarum before 1.8.16 contains an improper session invalidation vulnerability that allows attackers who hold a …
    CVE-2026-39923 (CVSS 9.2) — Flarum before 1.8.16 contains a password reset token expiry bypass vulnerability that allows unauthenticated a…
    CVE-2024-58303 (CVSS 8.6) — FoF Pretty Mail 1.1.2 contains a server-side template injection vulnerability that allows administrative users…
    CVE-2024-58302 (CVSS 6.9) — FoF Pretty Mail 1.1.2 contains a local file inclusion vulnerability that allows administrative users to includ…
    CVE-2025-27794 (CVSS 6.8) — Flarum is open-source forum software. A session hijacking vulnerability exists in versions prior to 1.8.10 whe…
    CVE-2023-40033 (CVSS 7.1) — Flarum is an open source forum software. Flarum is affected by a vulnerability that allows an attacker to cond…
    CVE-2023-27577 (CVSS 6.6) — flarum is a forum software package for building communities. In versions prior to 1.7.0 an admin account which…
    CVE-2023-22489 (CVSS 3.5) — Flarum is a discussion platform for websites. If the first post of a discussion is permanently deleted but the…
    CVE-2023-22488 (CVSS 6.8) — Flarum is a forum software for building communities. Using the notifications feature, one can read restricted/…
    CVE-2023-22487 (CVSS 7.7) — Flarum is a forum software for building communities. Using the mentions feature provided by the flarum/mention…

    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