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…

PriorityP427medium4.7CVSS 3.1

AVNACLPRNUIRSCCNILAN

EXPLOIT

EPSS

1.07%

60.6th percentile

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.

Affected

4 ranges

Vendor	Product	Version range	Fixed in
flarum	core	>= 0 < 1.8.5	1.8.5
flarum	flarum	< 1.8.5	1.8.5
flarum	framework	< 1.8.5	1.8.5
flarum	framework	>= 0 < 1.8.5	1.8.5

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