Mantis Bug Tracker XSS and Authentication Flaws

MantisBT versions prior to 2.28.1 contain an authentication bypass vulnerability in the SOAP API caused by improper type checking on the password parameter when running on MySQL family databases. An attacker who knows a victim's username can log in to the SOAP API without knowing the correct password and execute any API function available to that account. While a CVE CVSS score is not yet assigned, the vulnerability is patched in version 2.28.1, and disabling the SOAP API reduces but does not eliminate the risk.

MantisBT version 2.28.0 contains a Stored/Reflected Cross-Site Scripting (XSS) vulnerability in the tag deletion confirmation dialog (tag_delete.php) due to improper HTML escaping of tag names in the confirmation message. An authenticated attacker can inject malicious HTML and JavaScript code that executes in the browser of any user viewing the confirmation page, potentially leading to session hijacking, credential theft, or malware distribution. The vulnerability was patched in version 2.28.1, and proof-of-concept information is available via the GitHub security advisory and associated commit references.

MantisBT version 2.28.0 contains a stored cross-site scripting (XSS) vulnerability in the Timeline view of my_view_page.php where tag names are improperly escaped when retrieved from the History table, allowing attackers to inject arbitrary HTML and potentially execute JavaScript if Content Security Policy permits. This affects users viewing issues with renamed or deleted tags, and version 2.28.1 contains the patch. No CVSS score or EPSS data is currently available, but the vulnerability is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation) and carries moderate to high risk in environments without strict CSP enforcement.