Vulnerability details

CVE-2026-44657

mantisbt mantisbt

MantisBT: Stored XSS in File Download

CVSS 4.0

7.5High

Official 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.

CVSS scores

Score	Version	Source	Vector
7.5High	4.0	CVEProject cvelistV5 (CNA) (GitHub_M)	`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`

Affected products

Vendor	Product	Versions	Source
mantisbt	mantisbt	< 2.28.2	CVEProject cvelistV5 (CNA)

References and advisories

https://github.com/mantisbt/mantisbt/security/advisories/GHSA-p6fr-rxq7-xcg8 x_refsource_CONFIRM
https://github.com/mantisbt/mantisbt/security/advisories/GHSA-9c3j-xm6v-j7j3 x_refsource_MISC
https://github.com/mantisbt/mantisbt/commit/26647b2e68ba30b9d7987d4e03d7a16416684bc2 x_refsource_MISC
https://mantisbt.org/bugs/view.php?id=37020 x_refsource_MISC

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Details

Published: 2026-05-28
Last updated: 2026-05-29
State: Published
Assigner (CNA): GitHub_M

Exploit prediction (EPSS)

0.34%

Probability of exploitation in 30 days

28.7%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: No
Exploitation: None
Technical impact: Total

Weaknesses (CWE)

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