MantisBT has Stored HTML Injection/XSS when displaying Tags in Timeline
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. ### Impact Cross-site scripting (XSS). ### Patches f32787c14d4518476fe7f05f992dbfe6eaccd815 ### Workarounds * Edit offending History entries (using SQL) * Wrap `$this->tag_name` in a string_html_specialchars() call in IssueTagTimelineEvent::html() ### Credits MantisBT thanks Vishal Shukla for discovering and responsibly reporting the issue.
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-33548US | medium6.1 | — | ||
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 att… | ||||
references
External citations — patches, advisories, analysis.
- https://github.com/mantisbt/mantisbtPACKAGE
- https://github.com/mantisbt/mantisbt/commit/f32787c14d4518476fe7f05f992dbfe6eaccd815WEB
- https://github.com/mantisbt/mantisbt/security/advisories/GHSA-73vx-49mv-v8w5WEB
- https://mantisbt.org/bugs/view.php?id=36973WEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-33548ADVISORY
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