CVE-2026-71620 in ApiAdmin
Summary
by MITRE • 09/04/2026
File Upload vulnerability in Zhao-github ApiAdmin v.5.0.1 allows a remote attacker to execute arbitrary code via a crafted .php file
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Analysis
by VulDB Data Team • 09/04/2026
The security flaw identified in the API administration interface of Zhao-github version 5.0.1 represents a critical failure in input validation and access control mechanisms, specifically categorized under CWE-434 which denotes an unrestricted upload of a file with dangerous content. This vulnerability arises from the application's inability to properly sanitize or validate files uploaded through its administrative endpoints. When a user interacts with the file upload functionality, the system fails to enforce strict constraints on file types, extensions, and contents. Consequently, an attacker can bypass standard security checks by crafting a malicious payload disguised as a legitimate document but containing executable PHP code. This lack of rigorous validation allows the server to accept and store arbitrary files without verifying their integrity or origin against a whitelist of approved formats.
The operational impact of this vulnerability is severe, leading directly to Remote Code Execution (RCE). Once the crafted .php file is successfully uploaded to a directory that has execute permissions enabled by default configuration settings, an attacker can trigger its execution simply by accessing it via a web request. This effectively grants the attacker full control over the underlying server environment running the Zhao-github application. The consequences of such unauthorized access include complete compromise of system confidentiality, integrity, and availability. Attackers may exfiltrate sensitive data stored within the database or file systems, modify critical configuration files to maintain persistence, install additional malware for botnet recruitment, or use the compromised host as a pivot point to attack other internal network resources. This aligns with MITRE ATT&CK techniques such as T1505 which covers Server Software Component Injection and T1059 Command and Scripting Interpreter for executing arbitrary commands on the target system.
Mitigation strategies must address both immediate remediation and long-term architectural improvements. The most effective solution is to upgrade to a patched version of Zhao-github where this vulnerability has been resolved by implementing strict file type validation, ensuring that only whitelisted extensions are accepted. If an update is not immediately available, administrators should implement server-side controls such as disabling script execution in the upload directory using web server configuration directives like Apache's Options directive or Nginx location blocks to prevent PHP interpretation of uploaded files. Additionally, implementing a Content Security Policy and ensuring that file uploads are stored outside the web root can significantly reduce the attack surface. Regular security audits focusing on input validation patterns and adherence to secure coding standards such as OWASP Top 10 guidelines for broken access control and insecure direct object references are essential to prevent similar vulnerabilities in future development cycles.