A flaw has been found in ArtMin96 yii2-mcp-server version 1.0.2. This vulnerability allows exploitation through the function yii_command_help/yii_execute_command located in the file src/index.ts of the MCP Interface component. Attackers can execute a manipulation that leads to operating system command injection, which can be executed remotely. The exploit has already been published and may be leveraged by malicious actors. Despite being informed of the issue early via an issue report, the project has not yet responded.
The CVSS score for this vulnerability is 2.1, which categorizes it as low severity. While the score indicates a lesser risk, organizations should still take this flaw seriously. The potential for remote command injection, even with low severity, poses a risk to system integrity and confidentiality.
Given the nature of this vulnerability, it is crucial for organizations to assess their exposure and take appropriate measures. The urgency for defenders is to schedule remediation and prioritize patching, as the impacts can manifest in unwanted access or system manipulation.
Currently, there are no known public exploits or proof-of-concept codes available, but this does not diminish the need for vigilance. Organizations must remain proactive in their security posture.
Vulnerability Details
The specific vulnerability in this case is classified under CWE-77 (Command Injection) and CWE-78 (OS Command Injection), which further highlights the risks involved. The vulnerability was published on May 2, 2026, and has not yet been addressed by the vendor.
Organizations using or considering the implementation of the yii2-mcp-server should be aware of this vulnerability and take appropriate measures to mitigate potential risks.
Technical Analysis
The root cause of this vulnerability lies in insufficient input validation, allowing attackers to inject arbitrary commands through the vulnerable command execution function. The attack vector is over the network, and the attack complexity is low, making it easier for attackers to exploit this flaw.
The privileges required to exploit this vulnerability are low, meaning that even users with limited access can potentially execute commands. Importantly, no user interaction is required, which increases the risk of exploitation.
The vulnerability's impacts on confidentiality, integrity, and availability are all rated as low, but the implications of an exploit could lead to unauthorized access to sensitive information or manipulation of system functions.
Risk & Impact Analysis
Risk to organizations includes the potential for unauthorized command execution, which could lead to data breaches or other malicious activities. The blast radius for this vulnerability can be significant, especially for organizations that deploy the affected component widely.
Given the CVSS score of 2.1, this vulnerability may not seem critical at first glance, but the potential impact of exploitation necessitates a thoughtful response. Organizations should assess their risk exposure and prioritize remediation strategies.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
This vulnerability affects ArtMin96 yii2-mcp-server version 1.0.2. Organizations should assume that all versions prior to any future vendor patches are vulnerable.
Mitigation & Remediation
Organizations should prioritize patching of the affected component. If a patch is not available, they should consider implementing network controls to restrict access to the vulnerable functionality. Further, organizations may benefit from conducting a comprehensive security assessment to ensure that all potential vulnerabilities are addressed.
For ongoing security measures, organizations should engage in penetration testing to identify similar weaknesses.
Detection Guidance
Organizations should monitor logs for unusual command executions or any signs of exploitation attempts. Behavioral anomalies in application usage may indicate attempts to exploit this vulnerability. Additionally, network signatures should be established to detect unauthorized access attempts related to this flaw.
AppSecure Threat Intelligence Insight
The long-term significance of this vulnerability rests in the ongoing trend of command injection vulnerabilities, which remain prevalent in web applications. Organizations are encouraged to adopt a proactive approach to vulnerability management, regularly assessing their systems for such risks.
Security teams should take lessons from this incident and implement rigorous security testing practices as part of their development cycle. For further insights on effective security strategies, organizations can explore resources on penetration testing methodology and vulnerability management programs to enhance their defense mechanisms.
Finally, organizations should consider engaging in API security testing to further secure their applications against similar vulnerabilities.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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