Drupal Improper Input Validation Vulnerability - CVE-2019-6339

In Drupal Core versions 7.x prior to 7.62 8.6.x prior to 8.6.6 and 8.5.x prior to 8.5.9 A remote code execution vulnerability exists in PHP39s built-in phar stream wrapper when performing file operations on an untrusted phar:// URI. Some Drupal code (core contrib and custom) may be performing file operations on insufficiently validated user input thereby being exposed to this vulnerability. This vulnerability is mitigated by the fact that such code paths typically require access to an administrative permission or an atypical configuration.