A configuration issue has been discovered in Forcepoint Email Security 8.4.x and 8.5.x: the product is left in a vulnerable state if the hybrid registration process is not completed.

A password reset vulnerability has been discovered in Forcepoint Email Security 8.5.x. The password reset URL can be used after the intended expiration period or after the URL has already been used to reset a password.

A stack-based buffer overflow in Forcepoint Email Security version 8.5 allows an attacker to craft malicious input and potentially crash a process creating a denial-of-service. While no known Remote Code Execution (RCE) vulnerabilities exist, as with all buffer overflows, the possibility of RCE cannot be completely ruled out. Data Execution Protection (DEP) is already enabled on the Email appliance as a risk mitigation.

It has been reported that XSS is possible in Forcepoint Email Security, versions 8.5 and 8.5.3. It is strongly recommended that you apply the relevant hotfix in order to remediate this issue.