CVE Catalog

CVE-2026-34463

HighCVSS 8.6
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.44%

36th percentile - higher than 36% of all known CVEs

Summary

MantisBT versions up to 2.28.1 contain a stored XSS vulnerability. When cloning an issue from another project, the source project name is displayed without proper escaping, allowing an attacker with manager or administrator privileges to inject HTML.

Risk Assessment

An attacker can inject a malicious script that executes in other users' browsers, leading to session theft, data leakage, or other actions in the victim's context.

Recommendation

Immediately update to version 2.28.2, which fixes this vulnerability.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS