Strapi through 4.5.5 does not verify the access or ID tokens issued during the OAuth flow when the AWS Cognito login provider is used for authentication. A remote attacker could forge an ID token that is signed using the 'None' type algorithm to bypass authentication and impersonate any user that use AWS Cognito for authentication.
https://www.ghostccamm.com/blog/multi_strapi_vulns/
https://strapi.io/blog/security-disclosure-of-vulnerabilities-cve