CVE-2024-21641: Flarum's Logout Route allows open redirects
Description
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.
Classification
CVE ID: CVE-2024-21641
CVSS Base Severity: MEDIUM
CVSS Base Score: 6.5
Affected Products
Vendor: flarum
Product: framework
Nuclei Template
http/cves/2024/CVE-2024-21641.yaml
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.08% (probability of being exploited)
EPSS Percentile: 36.86% (scored less or equal to compared to others)
EPSS Date: 2025-02-15 (when was this score calculated)
References
https://github.com/flarum/framework/security/advisories/GHSA-733r-8xcp-w9mrhttps://github.com/flarum/flarum-core/commit/ee8b3b4ad1413a2b0971fdd9e40f812d2a3a9d3a
https://github.com/flarum/framework/commit/7d70328471cf3091d92d95c382d277aec7996176