Summaryinfo

A vulnerability was found in mantisbt Mantis Bug Tracker 2.28.0. It has been classified as problematic. This impacts the function IssueTagTimelineEvent::html of the file my_view_page.php. Performing a manipulation results in cross site scripting. This vulnerability is identified as CVE-2026-33548. The attack can be initiated remotely. There is not any exploit available. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability was found in mantisbt Mantis Bug Tracker 2.28.0. It has been classified as problematic. This affects the function IssueTagTimelineEvent::html of the file my_view_page.php. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as 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. This is going to have an impact on integrity. The summary by CVE is:

Mantis Bug Tracker (MantisBT) is an open source issue tracker. In version 2.28.0, improper escaping of tag names retrieved from History in Timeline (my_view_page.php) allows an attacker to inject HTML and, if CSP settings permit, achieve execution of arbitrary JavaScript, when displaying a tag that has been renamed or deleted. Version 2.28.1 contains a patch. Workarounds include editing offending History entries (using SQL) and wrapping `$this->tag_name` in a string_html_specialchars() call in IssueTagTimelineEvent::html().

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-33548 since 03/20/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

By approaching the search of inurl:my_view_page.php it is possible to find vulnerable targets with Google Hacking. The vulnerability scanner Nessus provides a plugin with the ID 303450 (MantisBT 2.28.x < 2.28.2 Timeline Tag Name XSS (GHSA-73vx-49mv-v8w5)), which helps to determine the existence of the flaw in a target environment.

Applying the patch f32787c14d4518476fe7f05f992dbfe6eaccd815 is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the vulnerability database at Tenable (303450). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Bug Tracking Software

Vendor

• mantisbt

Name

• Mantis Bug Tracker

Version

• 2.28.0

License

• open-source

CPE 2.3info

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CPE 2.2info

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