CVE-2024-56197 Users can see other user's tagged PMs in Discourse

What is CVE-2024-56197?

CVE-2024-56197 is a low-severity vulnerability in Discourse Discourse, published on 4 Feb 2025. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

Discourse is an open source platform for community discussion. PM titles and metadata can be read by other users when the "PM tags allowed for groups" option is enabled, the other user is a member of a group added to this option, and the PM has been tagged. This issue has been patched in the latest `stable`, `beta` and `tests-passed` versions of Discourse. Users are advised to upgrade. Users unable to upgrade should remove all groups from the the "PM tags allowed for groups" option.

Weakness: CWE-200

Which versions are affected by CVE-2024-56197?

1 open source package ship an affected version, including discourse. It affects 1 product.

Products include Discourse Discourse.

How do I fix CVE-2024-56197?

Upgrade discourse to 3.4.0 or later.

Is CVE-2024-56197 being exploited?

There is no known exploitation of CVE-2024-56197 in the wild and no public exploit code.

Other vulnerabilities in Discourse Discourse

• CVE-2021-41163 RCE via malicious SNS subscription payload Critical 10.0
• CVE-2022-36066 Discourse vulnerable to RCE via admins uploading maliciously zipped file Critical 9.1
• CVE-2022-39356 Discourse user account takeover via email and invite link High 8.9
• CVE-2023-22468 Discourse vulnerable to Cross-site Scripting in local oneboxes High 8.8
• CVE-2026-27934 Discourse leaks private topic title and post excerpt via user action API endpoint High 8.7

All Discourse Discourse vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BIT-discourse-2024-56197, GHSA-xmgr-g9cp-v239.