Simple Machines announces the release of SMF 1.1.11, addressing multiple vulnerabilities found in SMF 1.1.10. Also for those still using the SMF 1.0.x branch, an upgrade to 1.0.19 was released. We strongly recommend that all users upgrade as soon as possible.

http://www.simplemachines.org/community/index.php?P=b2595dc3cd989b82a3506202d2c3123c&topic=351341.0

Edit: This is an important update for the forum software.