CVE-2026-42070 MEDIUM

CVE-2026-42070: MantisBT: Authorization Bypass in Bugnote Editing via Issue Update API

Vendor Mantisbt
Product mantisbt
Weakness CWE-863 · Incorrect authorization
Published May 28, 2026
Last update June 2, 2026
View on NVD All CVEs

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

What the vulnerability does

01Description

Mantis Bug Tracker (MantisBT) is an open source issue tracker. Prior to 2.28.2, the mc_issue_update() function in MantisBT allows users having update_bug_threshold access (UPDATER, with default settings) to edit, change view state, and modify time tracking on bugnotes belonging to other users — bypassing the default DEVELOPER (level 55) threshold required by the dedicated mc_issue_note_update() function. This vulnerability is fixed in 2.28.2.

Key dates

02Disclosure timeline

May 28, 2026 CVE published
June 2, 2026 Record updated