CVE-2024-0308 is a Server-Side Request Forgery (SSRF) vulnerability identified in the Inis software versions up to 2.0.1. The vulnerability arises from improper handling of the 'p_url' parameter in the file app/api/controller/default/Proxy.php. An attacker can manipulate this parameter to coerce the server into making unintended HTTP requests to arbitrary locations. SSRF vulnerabilities enable attackers to bypass network access controls, potentially accessing internal systems, sensitive data, or services that are otherwise inaccessible externally. The vulnerability is remotely exploitable without user interaction but requires some level of privileges (PR:L) on the system, as indicated by the CVSS vector. The CVSS score of 6.3 (medium severity) reflects the moderate impact on confidentiality, integrity, and availability, with low attack complexity and no user interaction needed. Although no public exploits are currently known in the wild, the vulnerability has been publicly disclosed, increasing the risk of exploitation. The lack of available patches at the time of disclosure means that affected organizations must rely on mitigation strategies until official fixes are released. SSRF vulnerabilities like this can be leveraged to perform internal reconnaissance, access metadata services, or pivot to other internal resources, posing significant risks especially in cloud or segmented network environments.

For European organizations using Inis versions 2.0.0 or 2.0.1, this SSRF vulnerability could lead to unauthorized internal network access, data leakage, or disruption of services. Given the ability to manipulate server requests, attackers might exploit this flaw to reach internal APIs, databases, or cloud metadata endpoints, potentially exposing sensitive information or enabling further attacks. Critical infrastructure, financial institutions, and government agencies in Europe that rely on Inis for internal or external services could face confidentiality breaches or service interruptions. The medium severity rating suggests that while the vulnerability is not trivially exploitable by unauthenticated attackers, the requirement for some privileges limits the attack surface somewhat. However, once exploited, the attacker could escalate their access or move laterally within the network, increasing the overall risk. The public disclosure of the vulnerability also raises the urgency for European organizations to assess their exposure and implement mitigations promptly to avoid targeted attacks.

European organizations should immediately audit their Inis installations to identify affected versions (2.0.0 and 2.0.1). In the absence of an official patch, organizations should implement strict input validation and sanitization on the 'p_url' parameter to restrict requests to trusted domains or internal endpoints. Network-level controls such as egress filtering and segmentation should be enforced to limit the server's ability to make arbitrary outbound requests. Employing web application firewalls (WAFs) with custom rules to detect and block suspicious SSRF patterns can provide additional protection. Monitoring server logs for unusual outbound requests originating from the vulnerable endpoint can help detect exploitation attempts early. Privilege management should be reviewed to minimize the number of users or processes with the required privileges to exploit this vulnerability. Finally, organizations should stay alert for official patches or updates from Inis and apply them promptly once available.