Vulnerability record · CVE-2026-42071 · published 28 May 2026

CVE-2026-42071: Missing authorization vulnerability

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.

7.2 CVSS 4.0 High EPSS 0.43% · top 65.5% CWE-862 · Missing authorization Deferred

7.2CVSS 4.0 base score

0.43%EPSS exploitation probability, 30 days

NoNot in CISA KEV

0Affected product versions listed by NVD

5References

17 Jun 2026Last modified by NVD

Description

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

Link	Tags
https://github.com/mantisbt/mantisbt/commit/029d9d203d9e4ae96b3e59d552fa7395cc1e5071
https://github.com/mantisbt/mantisbt/security/advisories/GHSA-pw5x-2mf9-3xc8
https://mantisbt.org/bugs/view.php?id=27039
https://mantisbt.org/bugs/view.php?id=36985
https://mantisbt.org/bugs/view.php?id=37092

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-42071), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.