An alert system administrator for PowerTech an ISP in Norway discovered a security vulnerability in Gallery yesterday. This security hole is a serious one; with it a malicious user can install a backdoor on your system and gain shell access with the same privileges as your webserver user. It's important that you realize that there are malicious people exploiting this bug *right* *now*. Read through to the bottom of this email for a list of IP addresses of sites that we believe may already be hacked, and ways to detect if you've been hacked.
Update: The most secure version of Gallery available is v1.3.1-cvs-b13. Upgrade ASAP.