GitHub Advisoryadvisory · Packagist

GHSA-73vx-49mv-v8w5 MantisBT has Stored HTML Injection/XSS when displaying Tags in Timeline

HIGH Published 2026-03-25 Modified 2026-03-25 Official page ↗
Aliases
CVE-2026-33548
Ecosystem
Packagist
Packages
mantisbt/mantisbt
Severity
High
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weaknesses
CWE-79
Reviewed
2026-03-25

Affected packages

• Packagist mantisbt/mantisbt: >= 2.28.0, < 2.28.2 → fixed in 2.28.2

Description

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.

Related

Alias · CVE (1)

  • CVE-2026-33548 Mantis Bug Tracker (MantisBT) is an open source issue tracker. vulnerability

Weakness · CWE (1)

  • CWE-79 Improper Neutralization of Input During Web Page Generation weakness

References