This version contains only a fix to a security bug in inc/app/webservices.php. Users installing playSMS 0.9.7 or 0.9.7.1 are encouraged to upgrade their installation as soon as possible. playSMS version prior to 0.9.7 are not affected.
A quick workaround to fix the bug is by removing inc/app/webservices.php immediately. See this for detail.
You may get playSMS 0.9.7.2 from our download page.