mantisbt Mantis Bug Tracker up to 2.28.1 Configuration g_show_user_realname cross site scripting

Summaryinfo

A vulnerability classified as problematic has been found in mantisbt Mantis Bug Tracker up to 2.28.1. The impacted element is an unknown function of the component Configuration g_show_user_realname Handler. The manipulation leads to cross site scripting. This vulnerability is listed as CVE-2026-40607. The attack may be initiated remotely. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in mantisbt Mantis Bug Tracker up to 2.28.1. It has been rated as problematic. This issue affects some unknown processing of the component Configuration g_show_user_realname Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. The summary by CVE is:

Mantis Bug Tracker (MantisBT) is an open source issue tracker. In versions 2.11.0 through 2.28.1, a Stored XSS vulnerability is caused by incorrect escaping of a saved filter's owner, allowing an attacker to inject arbitrary HTML on systems where $g_show_user_realname = ON. Note that By default, only users with Manager access level or above can save their filters publicly. This issue has been fixed in version 2.28.2. If developers are unable to update immediately, they can work around this issue by preventing display of users' real names (set $g_ show_user_realname = OFF; in configuration), and restricting the ability to store filters (set $g_stored_query_create_threshold / $g_stored_query_create_shared_threshold to NOBODY).

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-40607 since 04/14/2026. The exploitation is known to be easy. The attack may be initiated remotely. Additional levels of successful authentication are necessary for exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

Upgrading to version 2.28.2 eliminates this vulnerability. Applying the patch 44f490bcf20fd491c1b8f3fc9dd041d8c2a30010 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Bug Tracking Software

Vendor

• mantisbt

Name

• Mantis Bug Tracker

Version

• 2.28.0
• 2.28.1

License

• open-source

CPE 2.3info

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CPE 2.2info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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