CVE-2024-21641

MEDIUM NUCLEI

Flarum < 1.8.5 - Open Redirect via Logout Route Redirect Parameter

Title source: llm
STIX 2.1

Exploitation Summary

CVE-2024-21641 has a Nuclei detection template available — see the Nuclei card below for the Shodan/FOFA recon queries.

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.

Nuclei Templates (1)

Flarum < 1.8.5 - Open Redirect
MEDIUMVERIFIEDby kking
FOFA: header="flarum_session="

References (3)

Core 3

Scores

CVSS v3 6.5
EPSS 0.0107
EPSS Percentile 60.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-601
Status published
Products (3)
flarum/core 0 - 1.8.5Packagist
flarum/flarum < 1.8.5
flarum/framework 0 - 1.8.5Packagist
Published Jan 05, 2024
Tracked Since Feb 18, 2026