GitHub Advisoryadvisory · Packagist

GHSA-p6fr-rxq7-xcg8 MantisBT Vulnerable to Stored XSS in File Download

HIGH Published 2026-05-11 Modified 2026-06-09 Official page ↗
Aliases
CVE-2026-44657
Ecosystem
Packagist
Packages
mantisbt/mantisbt
Severity
High
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
Weaknesses
CWE-79
Reviewed
2026-05-11

Affected packages

• Packagist mantisbt/mantisbt: < 2.28.2 → fixed in 2.28.2

Description

Using *show_inline=1* parameter and a valid *file_show_inline_token* CSRF token on file_download.php, an attacker can execute code by uploading a crafted XHTML attachment referencing a JavaScript attachment. Impact Cross-site scripting Patches • 26647b2e68ba30b9d7987d4e03d7a16416684bc2 Workarounds None Credits Thanks to siunam (Tang Cheuk Hei) for discovering and responsibly reporting the issue.

Related

Alias · CVE (1)

  • CVE-2026-44657 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