Unknown · Mantis Bug Tracker · CVE-2026-33548
**Name of the Vulnerable Software and Affected Versions**
Mantis Bug Tracker versions prior to 2.28.1
**Description**
Mantis Bug Tracker version 2.28.0 contains a flaw due to improper escaping of tag names retrieved from History in the Timeline feature, specifically within the `my view page.php` file. This allows an attacker to inject HTML code. If Content Security Policy (CSP) settings allow, this can lead to the execution of arbitrary JavaScript when displaying a tag that has been renamed or deleted. The vulnerable variable is `$this->tag name` within the `IssueTagTimelineEvent::html()` function.
**Recommendations**
Update to Mantis Bug Tracker version 2.28.1 or later.
As a workaround, edit the offending History entries using SQL.
As a workaround, wrap `$this->tag name` in a `string html specialchars()` call within the `IssueTagTimelineEvent::html()` function.