CVE-2025-15130 is a code injection vulnerability identified in the shanyu SyCms content management system, specifically affecting the addPost function within the Application/Admin/Controller/FileManageController.class.php file of the administrative panel component. The vulnerability arises from improper input validation or sanitization in this function, allowing an attacker to inject arbitrary code remotely. The attack vector is network-based (AV:N), requires low attack complexity (AC:L), but necessitates high privileges (PR:H) and no user interaction (UI:N). The vulnerability impacts confidentiality, integrity, and availability at a low level (VC:L, VI:L, VA:L). The affected version is a specific commit (a242ef2d194e8bb249dc175e7c49f2c1673ec921) of SyCms, which is no longer supported by the vendor, and no patches have been released. The project follows a rolling release model but has not responded to the vulnerability report. Although public exploit code has been disclosed, no active exploitation in the wild has been reported. The vulnerability’s medium CVSS score (5.1) reflects the requirement for administrative privileges, which limits the scope of potential attackers but still poses a significant risk if an attacker gains such access. The lack of vendor response and patch availability increases the risk for organizations continuing to use this unsupported software. The vulnerability could allow attackers to execute arbitrary code on the server, potentially leading to full system compromise, data theft, or service disruption.

For European organizations, the impact of CVE-2025-15130 depends largely on the presence and use of the affected SyCms versions. Organizations running unsupported versions of SyCms with administrative panels exposed to the network are at risk of remote code execution attacks if an attacker can obtain or already has administrative credentials. This could lead to unauthorized access, data breaches, defacement, or disruption of services. Given the administrative privilege requirement, the threat is more relevant in scenarios where internal threat actors or compromised credentials exist. The lack of vendor support and patches means organizations cannot rely on official fixes, increasing the risk of prolonged exposure. Critical sectors such as government, healthcare, and finance using SyCms may face regulatory and reputational damage if exploited. The medium severity score suggests moderate urgency but does not diminish the potential for serious consequences if exploited in sensitive environments.

1. Immediate mitigation should focus on restricting access to the administrative panel by implementing strict network segmentation and firewall rules to limit access only to trusted IPs or VPNs. 2. Enforce strong authentication mechanisms, including multi-factor authentication, to reduce the risk of credential compromise. 3. Conduct thorough audits of user privileges to ensure that only necessary personnel have administrative access. 4. Monitor logs and network traffic for suspicious activity related to the addPost function or unexpected code execution attempts. 5. Given the lack of vendor patches, organizations should plan to migrate away from the unsupported SyCms version to a maintained CMS platform or a supported version if available. 6. Employ web application firewalls (WAFs) with custom rules to detect and block code injection patterns targeting the vulnerable function. 7. Regularly back up critical data and test recovery procedures to mitigate impact in case of compromise. 8. Educate internal teams about the risks of this vulnerability and the importance of credential security.