The CF7 Google Sheets Connector plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the 'executepostdatacg7free' function in all versions up to, and including, 5.0.9. This makes it possible for unauthenticated attackers to toggle site configuration settings, including WPDEBUG, WPDEBUGLOG, SCRIPTDEBUG, and SAVEQUERIES.