CVE-2026-34463highCWE-79

CVE-2026-34463: high-severity vulnerability in mantisbt

MantisBT has Stored HTML Injection/XSS via Clone Issue Form

Published · Updated

Follow this CVE+ Monitor mantisbt+ Monitor mantisbt/mantisbt

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 8.6epss 0.4%
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.
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
Affected products
mantisbt · mantisbt
Related CVEs — mantisbt

In the same product, most dangerous first.

CVE-2026-30849CRITICALMantisBT SOAP API has an authentication bypass vulnerability on MySQLEPSS 1.8%CVE-2024-34077HIGHMantisBT user account takeover in the signup/reset password processEPSS 1.2%CVE-2024-23830HIGHMantisBT Host Header Injection vulnerabilityEPSS 1.0%CVE-2023-44394MEDIUMDisclosure of project names to unauthorized users in MantisBTEPSS 0.7%CVE-2024-34080MEDIUMMantisBT Vulnerable to Exposure of Sensitive Information to an Unauthorized ActorEPSS 0.7%CVE-2026-47156CRITICALMantisBT: SOAP API Authentication Bypass with Privilege Escalation to AdministratorEPSS 0.7%