CVE-2024-55461 is a critical security vulnerability identified in SeaCMS, a content management system, affecting all versions up to and including 13.0. The vulnerability resides in the phome.php script, specifically within the Ebak_RepPathFiletext() function, which improperly handles user input leading to command injection (CWE-77). This flaw allows remote attackers to execute arbitrary operating system commands without any authentication or user interaction, making exploitation straightforward over the network. The vulnerability has been assigned a CVSS v3.1 base score of 9.8, reflecting its critical nature with attack vector as network (AV:N), low attack complexity (AC:L), no privileges required (PR:N), and no user interaction (UI:N). The impact covers confidentiality, integrity, and availability, enabling attackers to fully compromise affected systems, steal sensitive data, modify content, or disrupt services. Although no public exploits have been reported yet, the vulnerability's characteristics suggest that exploitation tools could be developed rapidly. The vulnerability is linked to CWE-77, which involves improper neutralization of special elements in OS commands, a common and dangerous injection flaw. SeaCMS is used primarily in Chinese-speaking regions but also has deployments worldwide, especially in small to medium enterprises relying on this CMS for web content management. The lack of available patches at the time of disclosure increases the urgency for immediate mitigation and monitoring.

The impact of CVE-2024-55461 is severe and wide-ranging. Successful exploitation allows unauthenticated remote attackers to execute arbitrary commands on the underlying server hosting SeaCMS, potentially leading to full system compromise. This can result in unauthorized data access, data modification or deletion, service disruption, and use of the compromised server as a pivot point for further attacks within an organization’s network. The vulnerability threatens confidentiality by exposing sensitive information, integrity by allowing unauthorized changes, and availability by enabling denial-of-service conditions or ransomware deployment. Organizations relying on SeaCMS for their web presence or internal content management face significant operational and reputational risks. The critical severity and ease of exploitation mean that attackers can quickly weaponize this vulnerability, increasing the likelihood of widespread attacks once exploit code becomes available. The absence of authentication requirements and user interaction further amplifies the risk, making all exposed SeaCMS installations vulnerable to remote compromise.

To mitigate CVE-2024-55461, organizations should immediately restrict access to the phome.php file, ideally limiting it to trusted IP addresses or internal networks only. Deploy web application firewalls (WAFs) with updated rules to detect and block command injection attempts targeting the Ebak_RepPathFiletext() function or suspicious payloads in HTTP requests. Monitor server and application logs for unusual command execution patterns or unexpected system calls. If possible, disable or remove the vulnerable function or script until an official patch is released. Conduct thorough security audits of SeaCMS installations to identify and isolate vulnerable instances. Employ network segmentation to limit the impact of a potential compromise. Regularly back up critical data and verify restoration procedures to minimize damage from potential exploitation. Stay informed about vendor updates or community patches and apply them promptly once available. Additionally, consider deploying intrusion detection systems (IDS) that can detect exploitation attempts based on known signatures or anomalous behavior.