Description
Drupal Core is prone to a directory traversal vulnerability because it fails to sufficiently verify user-supplied input. Exploiting this issue can allow an attacker to obtain sensitive information that could aid in further attacks. Drupal Core versions 8.x.x ranging from 8.0.0 and up to and including 8.5.15 are vulnerable.
Remediation
Update to Drupal Core version 8.6.16 or latest
References
Related Vulnerabilities
WordPress Plugin Custom Tables 'key' Parameter Cross-Site Scripting (3.4.4)
WordPress Plugin True Ranker Directory Traversal (2.2.2)
WordPress Plugin Clean Login Cross-Site Request Forgery (1.7.12)
WordPress Plugin User Activation Email Cross-Site Scripting (1.3.0)
WordPress Plugin Visual CSS Style Editor Security Bypass (7.1.9)