An issue was discovered in MISP before 2.4.121. It mishandled time skew (between the machine hosting the web server and the machine hosting the database) when trying to block a brute-force series of invalid requests.
An issue was discovered in MISP before 2.4.121. ACLs for discussion threads were mishandled in app/Controller/ThreadsController.php and app/Model/Thread.php.
MISP before 2.4.115 allows privilege escalation in certain situations. After updating to 2.4.115, escalation attempts are blocked by the __checkLoggedActions function with a "This could be an indication of an attempted privilege escalation on older vulnerable versions of MISP (<2.4.115)" message.
In app/webroot/js/event-graph.js in MISP 2.4.111, a stored XSS vulnerability exists in the event-graph view when a user toggles the event graph view. A malicious MISP event must be crafted in order to trigger the vulnerability.
app/Model/Server.php in MISP 2.4.109 allows remote command execution by a super administrator because the PHP file_exists function is used with user-controlled entries, and phar:// URLs trigger deserialization.