Moodle Improper Input Validation Vulnerability - CVE-2011-4302
mnet/xmlrpc/client.php in MNET in Moodle 1.9.x before 1.9.14 2.0.x before 2.0.5 and 2.1.x before 2.1.2 does not properly process the return value of the openssl_verify function which allows remote attackers to bypass validation via a crafted certificate.