MantisBT has an authorization bypass in private issue monitoring
Using a crafted POST request to bug_monitor_add.php, a user with project-level access can add themselves as a monitor for a private issue they do not have access to. Despite displaying an Access Denied error, the application accepts the request and creates a monitor relationship for the private issue. ### Impact Direct access to the private issue remains blocked, but the user will receive email notifications for updates, leading to disclosure of the private issue's metadata and content. ### Patches - 0a93267deba445fb9d15250c16e6fdb1246ffa65 ### Workarounds None ### Credits Thanks to Vishal Shukla for discovering and responsibly reporting the issue.
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-34579US | —OT elevated | — | ||
Mantis Bug Tracker (MantisBT) is an open source issue tracker. Versions 2.28.1 and prior are vulnerable to Authorization Bypass through the private issue monitoring feature . Using… | ||||
references
External citations — patches, advisories, analysis.
- https://github.com/mantisbt/mantisbtPACKAGE
- https://github.com/mantisbt/mantisbt/commit/0a93267deba445fb9d15250c16e6fdb1246ffa65WEB
- https://github.com/mantisbt/mantisbt/security/advisories/GHSA-ggw7-9675-6v4vWEB
- https://mantisbt.org/bugs/view.php?id=36975WEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-34579ADVISORY
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