SeaMonkey is an open source Web browser, email and newsgroup client, IRC chat client, and HTML editor. Several use-after-free flaws were found in SeaMonkey. Visiting a web page containing malicious content could result in SeaMonkey executing arbitrary code with the privileges of the user running SeaMonkey. Several flaws were found in the processing of malformed web content. A web page containing malicious content could cause SeaMonkey to crash or, potentially, execute arbitrary code with the privileges of the user running SeaMonkey. All SeaMonkey users should upgrade to these updated packages, which correct these issues. After installing the update, SeaMonkey must be restarted for the changes to take effect.