OpenAM (Open Identity Platform) is an open-source Identity and Access Management (IAM) platform derived from ForgeRock OpenAM, providing SSO, OAuth2, SAML, and OpenID Connect capabilities. It is widely deployed in enterprise environments as a central authentication gateway. The "/sessionservice" endpoint, used for internal session management operations, does not sufficiently restrict the URLs that authenticated users may register for session event notifications. Under certain conditions, this may result in outbound server-side requests to attacker-controlled destinations, potentially exposing session-related data. This behavior results in a server-side request forgery (SSRF) vulnerability, where an authenticated attacker can trigger outbound requests to arbitrary destinations. Credit Discovered by JD-Security SHENYI Team