CVE-2026-34463
HIGHMantisBT has Stored HTML Injection/XSS via Clone Issue Form
Title source: cnaDescription
Mantis Bug Tracker (MantisBT) is an open source issue tracker. Versions 2.28.1 and prior contain a Stored XSS vulnerability. When cloning an issue originating from a Project other than the current one, the clone form (bug_report_page.php) prepends the source Project name before the category selector without proper escaping, allowing an attacker able to to inject HTML if they can set the Project's name (which typically requires manager or administrator access level). This issue has been resolved in version 2.28.2.
References (3)
Core 3
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/mantisbt/mantisbt/security/advisories/GHSA-fvjf-68wh-rwp2
X_Refsource_Misc x_refsource_misc
https://github.com/mantisbt/mantisbt/commit/df22697ae497ddd93f3d9132fdf4979db8d081cd
X_Refsource_Misc x_refsource_misc
https://mantisbt.org/bugs/view.php?id=36986
Scores
CVSS v4
8.6
EPSS
0.0044
EPSS Percentile
35.2%
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-79
Status
published
Products (2)
mantisbt/mantisbt
0 - 2.28.2Packagist
mantisbt/mantisbt
< 2.28.2
Published
May 19, 2026
Tracked Since
May 19, 2026