What’s Vulnerable › Vulnerabilities
CVE-2024-56197: Users can see other user's tagged PMs in Discourse
- Severity: medium (CVSS 4.9 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2025-02-04 · updated 2026-06-17
- Weakness: CWE-200
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.
Affected products
- discourse: before 3.3.4; before 3.4.0; 3.4.0-beta1, 3.4.0-beta2, 3.4.0-beta3, 3.4.0-beta4 — fixed in 3.3.4, 3.4.0
How to fix
Upgrade to a fixed version: discourse 3.3.4, 3.4.0. Check the vendor advisory for mitigations.
References
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