CVE-2022-24804: Private group name exposure in discourse

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-04-11 · updated 2026-06-17
Weakness: CWE-200

Description

Discourse is an open source platform for community discussion. In stable versions prior to 2.8.3 and beta versions prior 2.9.0.beta4 erroneously expose groups. When a group with restricted visibility has been used to set the permissions of a category, the name of the group is leaked to any user that is able to see the category. To workaround the problem, a site administrator can remove groups with restricted visibility from any category's permissions setting.

Affected products

discourse: before 2.8.3; 2.9.0-beta1, 2.9.0-beta2, 2.9.0-beta3 — fixed in 2.8.3

How to fix

Upgrade to a fixed version: discourse 2.8.3. Check the vendor advisory for mitigations.

References

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