Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS03MzNyLTh4Y3Atdzltcs4AA4N5

Flarum's logout Route allows open redirects

Impact

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. Sample: example.com/logout?return=https://google.com. 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.

Some ecosystem extensions modifying the logout route have already been affected. Sample: https://discuss.flarum.org/d/22229-premium-wordpress-integration/526

Patches

The vulnerability has been fixed and published as flarum/core v1.8.5. All communities running Flarum should upgrade as soon as possible to v1.8.5 using:

composer update --prefer-dist --no-dev -a -W

You can then confirm you run the latest version using:

composer show flarum/core

Workarounds

Some extensions modifying the logout route can remedy this issue if their implementation is safe. In any case we recommend updating to 1.8.5.

References

For any questions or comments on this vulnerability, please visit https://discuss.flarum.org/

For support questions, create a discussion at https://discuss.flarum.org/t/support.

A reminder that if you ever become aware of a security issue in Flarum, please report it to us privately by emailing [email protected], and we will address it promptly.

Permalink: https://github.com/advisories/GHSA-733r-8xcp-w9mr
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS03MzNyLTh4Y3Atdzltcs4AA4N5
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Low
Classification: General
Published: 11 months ago
Updated: 11 months ago

Identifiers: GHSA-733r-8xcp-w9mr, CVE-2024-21641
References:

• https://github.com/flarum/framework/security/advisories/GHSA-733r-8xcp-w9mr
• https://github.com/flarum/flarum-core/commit/ee8b3b4ad1413a2b0971fdd9e40f812d2a3a9d3a
• https://github.com/flarum/framework/commit/7d70328471cf3091d92d95c382d277aec7996176
• https://nvd.nist.gov/vuln/detail/CVE-2024-21641
• https://github.com/advisories/GHSA-733r-8xcp-w9mr

Repository: https://github.com/flarum/framework
Blast Radius: 0.0

Affected Packages