Mantis Bug Tracker (MantisBT) is an open source issue tracker. In versions 2.28.1 and below, improper escaping of the redirection page (retrieved from the request's Referer header) allows an attacker to inject HTML. While this is generally not directly actionable as modern browsers will URL-encode special characters, on some specific server configurations this could poison the cache, leading to cross-site scripting. This issue has been fixed in version 2.28.2.

The version of MantisBT installed on the remote host is prior to 2.28.2. It is, therefore, affected by multiple vulnerabilities:

  - MantisBT is vulnerable to Privilege Escalation from Manager to Administrator. (CVE-2026-34390)

  - MantisBT is vulnerable to Authorization Bypass in Bugnote Editing via Issue Update API. (CVE-2026-42070)

  - MantisBT is vulnerable to Stored XSS in Custom Field Textarea Values. (CVE-2026-39960)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - Mantis Bug Tracker (MantisBT) is an open source issue tracker. In versions 2.28.1 and below, improper
    escaping of the redirection page (retrieved from the request's Referer header) allows an attacker to
    inject HTML. While this is generally not directly actionable as modern browsers will URL-encode special
    characters, on some specific server configurations this could poison the cache, leading to cross-site
    scripting. This issue has been fixed in version 2.28.2. (CVE-2026-40598)

ID	Name	Product	Family	Type	Severity
315202	MantisBT < 2.28.2 Multiple Vulnerabilities	Nessus	CGI abuses : XSS	Remote	high
441745	SCA: security update for mantisbt/mantisbt (GHSA-6jh4-47v2-4g37)	Tenable Cloud Security	SCA Checks	Local	medium
441745	SCA: security update for mantisbt/mantisbt (GHSA-6jh4-47v2-4g37)	Tenable Self-Hosted Container Security	SCA Checks	Local	medium

Detections

Analytics

CVE-2026-40598

medium

Tenable Plugins

high

medium

medium