Tgstation · Tgstation-Server · CVE-2018-17107
**Name of the Vulnerable Software and Affected Versions**
tgstation-server versions 3.2.1.0 through 3.2.4.0
**Description**
The issue allows active logins to be cached, enabling subsequent logins to succeed with any username or password. This is due to a bug in the WCF communication layer, where the `authPolicy` parameter is used incorrectly, causing the server to cache previously returned policies. The bug was introduced to accommodate running the Control Panel using Mono.
**Recommendations**
For versions 3.2.1.0 through 3.2.4.0, update to version 3.2.5.0 or later to resolve the issue. As a temporary workaround, consider restricting access to the server to minimize the risk of exploitation.