CVE-2026-57447
MediumCVSS 4.3Summary
The Discourse Doc Categories plugin prior to the verified source fix refreshes the doc category index by resolving linked titles for private messages or restricted category topics without enforcing the viewer's authorization. A user who can edit the index topic can thereby learn titles they are not authorized to view.
Risk Assessment
A user with permission to edit the index topic can disclose titles of private messages or restricted category topics, resulting in an information leak about content structure.
Recommendation
Apply the fix from commit b15d4de02ad29d7c9525346afee51fef4a2c605a or update the plugin to a version containing this fix.
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Original NVD description (English source)
Discourse Doc Categories is a plugin for organizing Discourse topics as documentation. Prior to the verified source fix, the doc category index refresh resolves linked titles for private messages or restricted category topics without enforcing the viewer's authorization. A user who can edit the index topic can use this behavior to learn titles that the user is not authorized to view, although the advisory does not establish access to topic contents. This vulnerability is addressed by commit b15d4de02ad29d7c9525346afee51fef4a2c605a.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

