PT-2024-18991 · Flarum · Flarum

Davideiadeluca · Published 2024-01-05 · Updated 2025-04-28 · CVE-2024-21641

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Name of the Vulnerable Software and Affected Versions Flarum versions prior to 1.8.5

Description 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 any link. For logged-in users, the logout must be confirmed, while 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. Approximately 12,602 results are mainly distributed in the United States, China, and other countries.

Recommendations For versions prior to 1.8.5, update to version 1.8.5 using composer update --prefer-dist --no-dev -a -W, and then confirm the latest version using composer show flarum/core. As a temporary workaround, consider using extensions that modify the logout route, but only if their implementation is safe.

Exploit

Fix

Open Redirect

Weakness Enumeration

CWE-601

Related Identifiers

CVE-2024-21641

GHSA-733R-8XCP-W9MR

Affected Products

Flarum

References · 13

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/21xxx/CVE-2024-21641.json · Exploit
• https://github.com/flarum/framework/security/advisories/GHSA-733r-8xcp-w9mr · Vendor Advisory
• https://github.com/flarum/framework/commit/7d70328471cf3091d92d95c382d277aec7996176 · Patch
• https://github.com/flarum/flarum-core/commit/ee8b3b4ad1413a2b0971fdd9e40f812d2a3a9d3a · Patch
• https://osv.dev/vulnerability/GHSA-733r-8xcp-w9mr · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-21641 · Security Note
• https://osv.dev/vulnerability/CVE-2024-21641 · Vendor Advisory
• https://twitter.com/VulmonFeeds/status/1743416415732793835 · Twitter Post
• https://twitter.com/CVEnew/status/1743380233691042097 · Twitter Post
• https://twitter.com/zoomeye_team/status/1744296569644720604 · Twitter Post
• https://t.me/cvenotify/67920 · Telegram Post
• https://t.me/cvenotify/66462 · Telegram Post
• https://twitter.com/pdnuclei_bot/status/1916764331271729351 · Twitter Post