CIVI-SA-2020-03: PHP Code Execution via Phar Deserialization
Backend users may be able to upload and execute a maliciously crafted "PHAR" file.
The "PharExtensionInterceptor" library from Typo3 addresses this problem. Many projects - including the current Drupal and Joomla releases - already activate this protection and are already secure. However, some environments - such as WordPress - do not have it. This update extends the protection to all CiviCRM-supported environments.