CVE-2025-7103 is a server-side request forgery (SSRF) vulnerability identified in BoyunCMS versions up to 1.4.20. The vulnerability resides in the processing of the file /application/pay/controller/Index.php, specifically within the component that handles curl requests. SSRF vulnerabilities allow an attacker to induce the server to make HTTP requests to arbitrary domains or internal systems that the server can reach. In this case, the vulnerability can be triggered remotely without requiring user interaction or authentication, as indicated by the CVSS vector. The flaw likely stems from insufficient validation or sanitization of user-supplied input used in curl requests, enabling attackers to manipulate the destination of server-side HTTP requests. Although the CVSS score is rated medium (5.3), the vulnerability can be leveraged to access internal services, scan internal networks, or exploit trust relationships, potentially leading to further compromise. The exploit has been publicly disclosed, increasing the risk of exploitation, but no known active exploits have been reported in the wild yet. The vulnerability affects all BoyunCMS versions from 1.4.0 through 1.4.20, which suggests a long-standing issue in the payment controller component. Given the nature of SSRF, attackers could use this to bypass firewall restrictions, access internal-only resources, or perform reconnaissance within the victim's network environment. The lack of authentication or user interaction requirements makes this vulnerability easier to exploit remotely by unauthenticated attackers.

For European organizations using BoyunCMS, especially those leveraging the affected versions for e-commerce or payment processing, this SSRF vulnerability poses a significant risk. Exploitation could allow attackers to access internal systems that are otherwise protected by network segmentation or firewalls, potentially exposing sensitive internal services, databases, or administrative interfaces. This could lead to data leakage, unauthorized access, or pivoting deeper into the network. Given the payment controller context, there is also a risk of manipulation or interception of payment-related data flows, which could impact financial integrity and customer trust. The medium CVSS score reflects moderate direct impact, but the potential for chained attacks or lateral movement increases the overall threat. European organizations with strict data protection regulations (e.g., GDPR) could face compliance issues if internal data is exposed or exfiltrated due to this vulnerability. Additionally, the public disclosure of the exploit code increases the urgency for mitigation to prevent opportunistic attacks. The vulnerability's remote exploitability without authentication makes it a critical concern for internet-facing BoyunCMS deployments in Europe.

1. Immediate upgrade: Organizations should upgrade BoyunCMS to a version beyond 1.4.20 once a patch is released that addresses this SSRF vulnerability. If no patch is currently available, consider applying any vendor-provided workarounds or disabling the vulnerable payment controller functionality temporarily. 2. Input validation: Implement strict server-side validation and sanitization of all user inputs that influence outbound HTTP requests, especially in the payment controller component. 3. Network segmentation: Restrict the server's ability to make outbound HTTP requests to only trusted and necessary endpoints using firewall rules or network ACLs. This limits the potential impact of SSRF exploitation. 4. Monitoring and logging: Enable detailed logging of outbound HTTP requests from the BoyunCMS server and monitor for unusual or unexpected request patterns that could indicate exploitation attempts. 5. Web application firewall (WAF): Deploy or update WAF rules to detect and block SSRF attack patterns targeting the vulnerable endpoint. 6. Access controls: Limit access to the BoyunCMS administrative and payment interfaces to trusted IP addresses or VPN users to reduce exposure. 7. Incident response readiness: Prepare to investigate and respond to potential SSRF exploitation attempts, including network traffic analysis and forensic review of server logs.