This is the final post of a series on Single Sign-On and OpenID Connect 1.0 security. In this post, Responsible Disclosure processes with five vendors and maintainers of popular OpenID Connect implementations are outlined. We reported vulnerabilities and security issues in Amazon Cognito, Bitbucket Server, GitLab, Keycloak, and Salesforce.

This is the third post of a series on Single Sign-On and OpenID Connect 1.0 security. In this post, a more common CRLF injection in the context of OIDC is discussed in detail. We present issues discovered in GitLab (Severity: High - Critical) and Bitbucket Server (Severity: Informative - Low).

This is the second post of a series on Single Sign-On and OpenID Connect 1.0 security. In this post, the novel Login Confusion attack is described in detail. We use Bitbucket Server as an example.