An issue was discovered in MISP before 2.4.132. It can perform an unwanted action because of a POST operation on a form that is not linked to the login page.
app/Model/feed.php in MISP before 2.4.124 allows administrators to choose arbitrary files that should be ingested by MISP. This does not cause a leak of the full contents of a file, but does cause a leaks of strings that match certain patterns. Among the data that can leak are passwords from database.php or GPG key passphrases from config.php.