EUVD-2026-322747

fkie_cve-2026-42071

Mantis Bug Tracker (MantisBT) is an open source issue tracker. From 2.23.0 to 2.28.1, a missing authorization check in MantisBT's file visibility function allows any authenticated user (REPORTER+) to download attachments on private bugnotes they should not be able to access, via the REST API endpoint GET /api/rest/issues/{id}/files and SOAP API mc_issue_attachment_get endpoint. This vulnerability is fixed in 2.28.2.

GHSA-pw5x-2mf9-3xc8 — MantisBT has a Private Bugnote Attachment Content Leak via REST API

Affected: Packagist: mantisbt/mantisbt

A missing authorization check in MantisBT's file visibility function allows any authenticated user (REPORTER+) to download attachments on private bugnotes they should not be able to access, via the REST API endpoint GET /api/rest/issues/{id}/files and SOAP API mc_issue_attachment_get endpoint.

### Impact - REPORTER (access level 25) can view file attachments that were uploaded to private bugnotes by DEVELOPER/MANAGER/ADMIN users - Private bugnotes are intended for internal developer discussion; their attachments (logs, screenshots, patches) should be equally protected - The web UI is NOT affected — it filters through bugnote_get_all_visible_bugnotes() first

### Patches - 029d9d203d9e4ae96b3e59d552fa7395cc1e5071

### Workarounds None

### Credits Thanks to the following security researchers for independently discovering and responsibly reporting the issue. - Vishal Shukla - Tristan Madani (@TristanInSec) from Talence Security - Tang Cheuk Hei (@siunam321)

This advisory's contents was largely copied from Tristan's well-written report.

Most recent entries from all

EUVD-2026-322747

fkie_cve-2026-42071

GHSA-pw5x-2mf9-3xc8 — MantisBT has a Private Bugnote Attachment Content Leak via REST API