CVE-2026-96349 in SiteSkite Plugin
Summary
by MITRE • 09/30/2026
Unauthenticated Remote Code Execution (RCE) in SiteSkite <= 2.1.8 versions.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 10/01/2026
The vulnerability identified as an unauthenticated remote code execution flaw within SiteSkit version 2.1.8 and earlier represents a critical security failure that allows attackers to execute arbitrary commands on the target server without requiring valid credentials. This type of vulnerability typically stems from insufficient input validation or improper handling of user-supplied data in web application endpoints, allowing malicious actors to inject code that is subsequently processed by the backend system. The absence of authentication requirements significantly lowers the barrier for exploitation, enabling any internet-connected entity with network access to compromise the integrity and availability of the affected service. Such flaws are often categorized under CWE-94 Improper Control of Generation of Code or CWE-78 OS Command Injection depending on the specific mechanism used by the application to process the malicious input.
From a technical perspective, unauthenticated RCE vulnerabilities in web applications frequently arise when developers fail to sanitize inputs passed through query parameters, POST bodies, or HTTP headers before they are concatenated into system commands or evaluated as code. In the context of SiteSkit, this likely involves an endpoint that processes user data and passes it directly to a shell command interpreter or a scripting engine without adequate escaping or validation checks. Attackers can exploit this by crafting specially formatted requests containing malicious payloads designed to bypass any existing filters. The success of such exploitation relies on the privilege level under which the web application runs, often resulting in full control over the underlying operating system if the service is configured with elevated permissions.
The operational impact of successfully exploiting this vulnerability is severe and multifaceted. An attacker can achieve complete compromise of the server hosting SiteSkit, leading to unauthorized access to sensitive data stored within or accessible by the application. This includes potential exfiltration of user credentials, personal identifiable information, and proprietary business logic. Furthermore, the compromised system may be used as a pivot point for lateral movement within the internal network, allowing attackers to target other critical infrastructure components. The ability to execute arbitrary commands also facilitates the deployment of additional malware, such as ransomware or cryptominers, which can degrade performance and incur significant financial costs through resource consumption and remediation efforts.
Mitigation strategies must prioritize immediate patching if an updated version is available from the vendor. In cases where updating is not immediately feasible, network-level controls should be implemented to restrict access to the vulnerable endpoints. This includes configuring firewalls or web application firewalls to block known malicious payloads and limiting exposure of the service to trusted IP addresses only. Additionally, implementing strict input validation on all user-supplied data at the application layer can help prevent similar vulnerabilities in future updates. Security teams should also monitor for signs of exploitation by reviewing server logs for unusual command executions or unexpected outbound network connections indicative of reverse shells or data exfiltration attempts.
This vulnerability aligns with MITRE ATT&CK techniques related to Initial Access and Execution, specifically those involving web application attacks and remote services. The lack of authentication places it in the category of vulnerabilities that require no prior access, making them high-priority targets for automated scanning tools used by threat actors. Organizations must treat such findings as critical due to their direct impact on system integrity and the ease with which they can be exploited at scale across the internet. Regular security assessments and penetration testing are essential to identify and remediate these types of flaws before they can be leveraged in real-world attacks, ensuring that web applications remain resilient against evolving threat vectors.