Missing Authorization in MantisBT - CVE-2026-42071
Published: November 8, 2026
Vulnerability identifier: #VU161888
CSH Severity: Low
CVSS v4: 7.2 [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]
CVE-ID: CVE-2026-42071
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows an authenticated attacker with REPORTER or higher privileges to download confidential attachments from private bugnotes in MantisBT.
The vulnerability exists due to a missing authorization check in the file visibility function when attachment requests arrive through the REST or SOAP API. An authenticated attacker with REPORTER or higher privileges can request these attachments directly through either API and retrieve their contents without permission to view the associated private bugnotes.
Affected software
MantisBT
How to mitigate CVE-2026-42071
Install security update from vendor's website.
MantisBT - update to 2.28.2