CVE-2025-50234 is a Server-Side Request Forgery (SSRF) vulnerability identified in MCCMS version 2.7.0, specifically within the index() method of the sys\apps\controllers\api\Gf.php file. The vulnerability arises from insecure processing of the 'pic' parameter, which is decrypted using a hard-coded encryption key (Mc_Encryption_Key = bD2voYwPpNuJ7B8) defined in the db.php configuration file. After decryption via the sys_auth($pic, 1) function, the resulting URL is passed to the geturl() method, which uses cURL to perform HTTP requests without adequate validation or security checks on the URL. This lack of validation allows an attacker to craft a malicious encrypted 'pic' parameter that, when decrypted, points to internal network addresses (e.g., http://127.0.0.1) or local file system paths using protocols such as file://. Exploiting the file:// protocol enables the attacker to read arbitrary files on the server, including sensitive configuration files (/etc/passwd on Unix/Linux or hosts file on Windows), potentially exposing critical system information. The SSRF vulnerability also allows attackers to access internal services that are otherwise inaccessible externally, potentially leading to further exploitation such as remote code execution, privilege escalation, or full system compromise. The vulnerability's root cause is the use of a hard-coded encryption key and the absence of validation on the decrypted URL before making server-side requests, which violates secure coding practices and exposes the system to severe security risks. Although no known exploits are currently reported in the wild, the vulnerability's nature makes it a high-risk issue once weaponized.

For European organizations using MCCMS v2.7.0, this SSRF vulnerability poses significant risks. Attackers exploiting this flaw can gain unauthorized access to internal network resources, potentially bypassing firewalls and network segmentation. This can lead to leakage of sensitive data, including internal configuration files, credentials, and other critical information. The ability to read arbitrary files on the server can expose secrets that facilitate further attacks, such as lateral movement or privilege escalation. In worst-case scenarios, attackers could execute remote code or fully compromise affected systems, disrupting business operations and causing data breaches. Given the GDPR and other stringent data protection regulations in Europe, such breaches could result in severe legal and financial penalties. Additionally, organizations in sectors like finance, healthcare, and critical infrastructure are particularly vulnerable due to the sensitive nature of their data and the potential impact on public safety and trust.

To mitigate this vulnerability, European organizations should: 1) Immediately update MCCMS to a patched version once available from the vendor. If no patch exists, consider disabling or restricting access to the vulnerable API endpoint as a temporary measure. 2) Replace the hard-coded encryption key with a securely managed key stored outside the source code, using environment variables or secure vaults. 3) Implement strict validation and sanitization of decrypted URLs before making server-side requests, including whitelisting allowed protocols and domains to prevent SSRF exploitation. 4) Employ network segmentation and firewall rules to restrict server access to only necessary internal resources, minimizing the attack surface. 5) Monitor logs for unusual outbound requests from the application server, which may indicate exploitation attempts. 6) Conduct thorough security audits and penetration testing focusing on SSRF and related vulnerabilities. 7) Educate developers on secure coding practices to avoid hard-coded secrets and improper input validation.