The Ubercart module 6.x-2.x before 6.x-2.8 and 7.x-3.x before 7.x-3.1 for Drupal stores passwords for new customers in plaintext during checkout, which allows local users to obtain sensitive information by reading from the database.
http://www.securityfocus.com/bid/53251
http://www.openwall.com/lists/oss-security/2012/05/03/2
http://www.openwall.com/lists/oss-security/2012/05/03/1
http://secunia.com/advisories/48935
http://drupal.org/node/1547674