CVE-2026-42071CWE-862

MantisBT: Private Bugnote Attachment Content Leak via REST API

High · published May 28, 2026

CVSS v4.0
7.2
EPSS
0%
Percentile
35.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
7.2 · HIGH
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N
EPSS
0.00427 · 35.9th percentile
Weakness
CWE-862 · Missing Authorization
Published
2026-05-28T20:29Z
EPSS history
Timeline
  • 28 MAY 20:29Z
    MantisBT: Private Bugnote Attachment Content Leak via REST API
    cvelistv5