The Receive Service in Websense Email Security before 7.1 does not recognize domain extensions in the blacklist, which allows remote attackers to bypass intended access restrictions and send e-mail messages via an SMTP session.
The Filtering Service in Websense Enterprise 5.2 through 6.3 does not consider the IP address during URL categorization, which makes it easier for remote attackers to bypass filtering via an HTTP request, as demonstrated by a request to a compromised server associated with a specific IP address.