Package Instance

Insufficient Session Expiration
A flaw was found in Keycloak. This flaw allows a malicious user that is currently logged-in, to see the personal information of a previously logged-out user in the account manager section.

Improper Authentication
A flaw was found in the reset credential flow in all Keycloak versions before 8.0.0. This flaw allows an attacker to gain unauthorized access to the application.

Improper authorization in Keycloak
Due to improper authorization, Red Hat Single Sign-On is vulnerable to users performing actions that they should not be allowed to perform. It was possible to add users to the master realm even though no respective permission was granted.

Cross-site Scripting
When using `response_mode=form_post` it is possible to inject arbitrary Javascript-Code via the `state`-parameter in the authentication URL. This allows an XSS-Attack upon succesfully login.

Server-Side Request Forgery (SSRF)
A flaw was found in Keycloak, where it is possible to force the server to call out an unverified URL using the `OIDC` parameter `request_uri`. This flaw allows an attacker to use this parameter to execute a Server-side request forgery (SSRF) attack.

Improper Authentication
The SAML broker consumer endpoint in Keycloak ignores expiration conditions on SAML assertions. An attacker can exploit this vulnerability to perform a replay attack.

Improper Certificate Validation
The X.509 authenticator supports the verification of client certificates through the CRL, where the CRL list can be obtained from the URL provided in the certificate itself (CDP) or through the separately configured path. The CRL are often available over the network through unsecured protocols (`http` or `ldap`) and hence the caller should verify the signature and possibly the certification path. Keycloak currently does not validate signatures on CRL, which can result in a possibility of various attacks like man-in-the-middle.

Stored Cross-Site Scripting (XSS) in Keycloak via groups dropdown
### Summary

A Stored XSS vulnerability was reported in the Keycloak Security mailing list, affecting all the versions of Keycloak, including the latest release (16.0.1). The vulnerability allows a privileged attacker to execute malicious scripts in the admin console, abusing of the groups' dropdown functionality. 

### Impact

Successful attacks of this vulnerability can result a privileged attacker to load a XSS script, and steal data from other users. The impact can be considered moderate to low, considering privileged credentials are required.

### References
- Please refer to the Keycloak Security mailing list for more information.

Improper Certificate Validation
A flaw was found in Keycloak in versions before 10.0.0, where it does not perform the TLS hostname verification while sending emails using the SMTP server. This flaw allows an attacker to perform a man-in-the-middle (MITM) attack.