An issue was discovered in MISP before 2.4.158. In UsersController.php, password confirmation can be bypassed via vectors involving an "Accept: application/json" header.
An issue was discovered in MISP before 2.4.156. A malicious site administrator could store an XSS payload in the custom auth name. This would be executed each time the administrator modifies a user.
An issue was discovered in app/Model/SharingGroupServer.php in MISP 2.4.139. In the implementation of Sharing Groups, the "all org" flag sometimes provided view access to unintended actors.
The default setting of MISP 2.4.136 did not enable the requirements (aka require_password_confirmation) to provide the previous password when changing a password.