CVE-2026-44657 HIGH

CVE-2026-44657: MantisBT: Stored XSS in File Download

Vendor Mantisbt
Product mantisbt
Weakness CWE-79 · XSS
Published May 28, 2026
Last update May 29, 2026
View on NVD All CVEs

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction —
Confidentiality —
Integrity —

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

What the vulnerability does

01Description

Mantis Bug Tracker (MantisBT) is an open source issue tracker. Prior to 2.28.2, 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. This vulnerability is fixed in 2.28.2.

Key dates

02Disclosure timeline

May 28, 2026 CVE published
May 29, 2026 Record updated