Websites managed by MegaBIP in versions below 5.15 are vulnerable to Cross-Site Request Forgery (CSRF) as the form available under "/edytor/index.php?id=7,7,0" lacks protection mechanisms. A user could be tricked into visiting a malicious website, which would send POST request to this endpoint. If the victim is a logged in administrator, this could lead to creation of new accounts and granting of administrative permissions.
CWE-352