YabbSE 1.5.5c allows remote attackers to obtain sensitive information via a direct request to ssi_examples.php, which reveals the path.
YaBB SE 1.5.1 allows remote attackers to obtain sensitive information via a direct HTTP request to Admin.php, which reveals the full path in a PHP error message.
SQL injection vulnerability in post.php for YaBB SE 1.5.4 and 1.5.5 allows remote attackers to obtain hashed passwords via the quote parameter.