GitHub Advisoryadvisory · Packagist

GHSA-fh48-f69w-7vmp MantisBT Vulnerable to Stored HTML Injection in Tag Delete Confirmation

HIGH Published 2026-03-25 Modified 2026-03-25 Official page ↗
Aliases
CVE-2026-33517
Ecosystem
Packagist
Packages
mantisbt/mantisbt
Severity
High
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Weaknesses
CWE-79
Reviewed
2026-03-25

Affected packages

• Packagist mantisbt/mantisbt: >= 2.28.0, < 2.28.1 → fixed in 2.28.1

Description

Improper escaping of Tag name when deleting it in tag_delete.php allows an attacker to inject HTML and, if CSP settings permit, achieve execution of arbitrary JavaScript. Impact Cross-site scripting (XSS). Patches 80990f43153167c73f11eb4b2bc7108d0c3d6b46 Workarounds • Revert commit d6890320752ecf37bd74d11fe14fe7dc12335be9 • Manually edit language files to remove the sprintf placeholder `%1$s` from *$s_tag_delete_message* string, for example with `sed -r -i '/tag_delete_message/s/.%1\$s.//' -- lang/` Credits MantisBT hanks Vishal Shukla for discovering and responsibly reporting the issue.

Related

Alias · CVE (1)

  • CVE-2026-33517 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