Keycloak Vulnerability: Exchange of Access Tokens Possible

CVE-2023-0657

What is CVE-2023-0657?

A security flaw has been identified in Keycloak's handling of token types during the signature validation process. This vulnerability can be exploited by an authenticated attacker, allowing them to exchange a logout token for an access token. Such an exchange may lead to unauthorized access, enabling the attacker to retrieve data beyond their assigned permissions. This situation arises due to inadequate enforcement of token types, which compromises the integrity of the authorization mechanisms within the system. Organizations using Keycloak should review their configurations and apply necessary patches to mitigate potential security threats.

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