The Filtering Service in Websense Web Security and Web Filter before 6.3.1 Hotfix 106 and 7.x before 7.1 allow remote attackers to cause a denial of service (filtering outage) via a crafted URL.

The ISAPI Filter plug-in in Websense Enterprise, Websense Web Security, and Websense Web Filter 6.3.3 and earlier, when used in conjunction with a Microsoft ISA or Microsoft Forefront TMG server, allows remote attackers to bypass intended filtering and monitoring activities for web traffic via an HTTP Via header.

The Remote Filtering component in Websense Web Security and Web Filter before 6.3.3 Hotfix 18 and 7.x before 7.1.1 allows remote attackers to cause a denial of service (daemon exit) via a large volume of traffic.

Websense Web Security and Web Filter before 6.3.3 Hotfix 27 and 7.x before 7.1.1 allow remote attackers to cause a denial of service (Blue Coat appliance integration outage) via a long URL.

The TRITON management console in Websense Web Security before 7.6 Hotfix 24 allows remote attackers to bypass authentication and read arbitrary reports via a crafted uid field, in conjunction with a crafted userRoles field, in a cookie, as demonstrated by a request to explorer_wse/favorites.exe.

The Remote Filtering component in Websense Web Security and Web Filter before 7.1 Hotfix 66 allows local users to bypass filtering by (1) renaming the WDC.exe file or (2) deleting driver files.