CVE-2026-44657

Description

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.

PUBLISHED Reserved 2026-05-07 | Published 2026-05-28 | Updated 2026-05-29 | Assigner GitHub_M

Problem types

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

References

github.com/...ntisbt/security/advisories/GHSA-p6fr-rxq7-xcg8

github.com/...ntisbt/security/advisories/GHSA-9c3j-xm6v-j7j3

github.com/...ommit/26647b2e68ba30b9d7987d4e03d7a16416684bc2

mantisbt.org/bugs/view.php?id=37020

cve.org (CVE-2026-44657)

nvd.nist.gov (CVE-2026-44657)

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