config/initializers/secret_token.rb in Fat Free CRM before 0.12.1 has a fixed FatFreeCRM::Application.config.secret_token value, which makes it easier for remote attackers to spoof signed cookies by referring to the key in the source code.
https://github.com/fatfreecrm/fat_free_crm/wiki/Fixing-security-vulnerabilities-%2827th-Dec-2013%29
https://github.com/fatfreecrm/fat_free_crm/issues/300