GHSA-C2XG-QJQW-2V98 MantisBT: SOAP API Authentication Bypass with Privilege Escalation to Administrator

MantisBT 2.28.3 and earlier contains a critical authentication bypass in the SOAP API's mcichecklogin function. Any user knowing any valid cookiestring can authenticate as any other user knowing their username, including the administrator, without knowing the target's password. The vulnerability ...