Arbitrary JavaScript Injection via 'state' Parameter in Keycloak Authentication URL

CVE-2018-14655 · LOW Severity

AV:N/AC:M/AU:S/C:N/I:P/A:N

A flaw was found in Keycloak 3.4.3.Final, 4.0.0.Beta2, 4.3.0.Final. 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.

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