OpenPanel before 2.3.0 contains an unauthenticated server-side request forgery vulnerability in the /misc/favicon and /misc/og endpoints that accept an attacker-supplied url parameter with insufficient validation. Attackers can force the API to fetch arbitrary internal hosts and cloud metadata endpoints, with small responses returned verbatim enabling credential theft and internal service enumeration.

OpenPanel versions before 2.3.0 are affected by an unauthenticated server-side request forgery (SSRF) vulnerability. The vulnerability exists in the /misc/favicon and /misc/og endpoints, which accept an attacker-supplied url parameter without sufficient validation. Attackers can exploit this flaw to force the API to fetch arbitrary internal hosts and cloud metadata endpoints. Because small responses are returned verbatim to the attacker, this enables credential theft and internal service enumeration. No authentication is required to exploit this vulnerability, significantly raising its risk. Cloud environments are particularly at risk due to exposure of metadata services such as AWS IMDSv1. The issue is resolved in OpenPanel version 2.3.0. Users are strongly advised to upgrade immediately. References include the NVD entry, a GitHub security advisory, and a VulnCheck advisory.