Drupal Core 8.9.x Cross-Site Request Forgery (8.9.0 - 8.9.18)
Description
Drupal Core is prone to a cross-site request forgery vulnerability. Exploiting this issue may allow a remote attacker to perform certain administrative actions and gain unauthorized access to the affected application; other attacks are also possible. Drupal Core versions 8.9.x ranging from 8.9.0 and up to and including 8.9.18 are vulnerable.
Remediation
Update to Drupal Core version 8.9.19 or latest