With the rise of Single-Sign-On (SSO) and especially OAuth 2.0 and OpenID Connect (OIDC), the attack surface of web applications has increased significantly. In this post, I will show how to escalate a Cross-Site Scripting (XSS) vulnerability to an Account Takeover (ATO) by abusing OAuth2/OIDC gadgets and how to prevent such attacks.
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Ausführliche Details, Code-Beispiele & Hersteller-Stellungnahme auf security.lauritz-holtmann.de.
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