Description
Drupal Core is prone to a security bypass vulnerability. Exploiting this issue may allow attackers to bypass certain security restrictions and perform otherwise restricted actions. Drupal Core versions 8.7.x ranging from 8.7.0 and up to and including 8.7.10 are vulnerable.
Remediation
Update to Drupal Core version 8.7.11 or latest
References
Related Vulnerabilities
WordPress Plugin Custom 404 Pro Cross-Site Scripting (3.2.7)
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WordPress 4.8.x Prototype Pollution (4.8 - 4.8.18)
WordPress Plugin Alpine PhotoTile for Instagram Cross-Site Scripting (1.2.6.5)