Mantis Bug Tracker (MantisBT) is an open source issue tracker. Versions 2.28.1 and prior contain a Stored XSS vulnerability. When cloning an issue originating from a Project other than the current one, the clone form (bug_report_page.php) prepends the source Project name before the category selector without proper escaping, allowing an attacker able to to inject HTML if they can set the Project's name (which typically requires manager or administrator access level). This issue has been resolved 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. Versions 2.28.1 and prior contain a Stored
    XSS vulnerability. When cloning an issue originating from a Project other than the current one, the clone
    form (bug_report_page.php) prepends the source Project name before the category selector without proper
    escaping, allowing an attacker able to to inject HTML if they can set the Project's name (which typically
    requires manager or administrator access level). This issue has been resolved in version 2.28.2.
    (CVE-2026-34463)

ID	Name	Product	Family	Severity
315202	MantisBT < 2.28.2 Multiple Vulnerabilities	Nessus	CGI abuses : XSS	high
441755	SCA: security update for mantisbt/mantisbt (GHSA-fvjf-68wh-rwp2)	Tenable Cloud Security	SCA Checks	high
441755	SCA: security update for mantisbt/mantisbt (GHSA-fvjf-68wh-rwp2)	Tenable Self-Hosted Container Security	SCA Checks	high

Detections

Analytics

CVE-2026-34463

high

Tenable Plugins

high

high

high