CVE-2026-33517

MEDIUM

MantisBT Vulnerable to Stored HTML Injection in Tag Delete Confirmation

Title source: cna
STIX 2.1

Description

Mantis Bug Tracker (MantisBT) is an open source issue tracker. In version 2.28.0, when deleting a Tag (tag_delete.php), improper escaping of its name when displaying the confirmation message allows an attacker to inject HTML and, if CSP settings permit, achieve execution of arbitrary JavaScript. Version 2.28.1 fixes the issue. Workarounds include reverting commit d6890320752ecf37bd74d11fe14fe7dc12335be9 and/or manually editing language files to remove the sprintf placeholder `%1$s` from `$s_tag_delete_message` string.

References (3)

Scores

CVSS v3 6.1
EPSS 0.0004
EPSS Percentile 12.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-79
Status published
Products (3)
mantisbt/mantisbt 2.28.0
mantisbt/mantisbt = 2.28.0
mantisbt/mantisbt 2.28.0 - 2.28.1Packagist
Published Mar 23, 2026
Tracked Since Mar 24, 2026