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GHSA-frf7-jhp9-jxm6

Fix: mantisbt/mantisbt@69e0180

GHSA-frf7-jhp9-jxm6 is a CWE-284 vulnerability in mantisbt/mantisbt. O3 Security confirms whether GHSA-frf7-jhp9-jxm6 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.

MantisBT Vulnerable to Privilege Escalation from Manager to Administrator

Also known asCVE-2026-34390
Published
May 11, 2026
Updated
Jun 5, 2026
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Jun 5, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Real-World Exposure

1 pkg affected
🐘mantisbt/mantisbt

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

Insufficient access control checks in ProjectUsersAddCommand (used in manage_proj_user_add.php and REST API endpoint PUT /project/{id}/users) allows users having manage_project_threshold access level (manager by default) to grant project-level administrator access to any user (including themselves) in any Project they have manager rights in.

The normal project-user add form does restrict the selectable access levels to the actor's own project role or below. However, the backend handler still accepts a forged higher access_level value and writes it.

Impact

Privilege escalation.

The consequences of the privilege escalation are not as bad as it may sound, because having administrator access at Project level is effectively not very different from being manager, it does not actually give administrator privileges on the whole MantisBT instance. In particular, it does not let the upgraded user delete the Project or grant them any access to global administrative functions such as managing Users, Projects, Plugins, Custom Fields, etc.

Patches

  • 69e0180f180ed5acf48a8d281a73683a7bf32461

Workarounds

None

Credits

Thanks to the following security researchers for independently discovering and responsibly reporting the issue:

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistmantisbt/mantisbtall versions2.28.2

Detection & mitigation playbook

Open-source dependency
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for mantisbt/mantisbt. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

  2. Fix

    Update mantisbt/mantisbt to 2.28.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-frf7-jhp9-jxm6 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

  4. How O3 protects you

    O3 pinpoints whether GHSA-frf7-jhp9-jxm6 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to GHSA-frf7-jhp9-jxm6. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

Insufficient access control checks in _ProjectUsersAddCommand_ (used in *manage_proj_user_add.php* and REST API endpoint `PUT /project/{id}/users`) allows users having *manage_project_threshold* access level (*manager* by default) to grant project-level *administrator* access to any user (including themselves) in any Project they have *manager* rights in. The normal project-user add form does restrict the selectable access levels to the actor's own project role or below. However, the backend handler still accepts a forged higher access_level value and writes it. ### Impact Privilege escalati
O3 Security · Impact-Aware SCA

Is GHSA-frf7-jhp9-jxm6 in your dependencies?

O3 detects GHSA-frf7-jhp9-jxm6 across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

GHSA-frf7-jhp9-jxm6: mantisbt/mantisbt… | O3 Security