CVE-2023-26823 in ECShop
Summary
by MITRE • 03/08/2023
An arbitrary file upload vulnerability in the /admin/template.php component of shopEx EcShop v4.1.5 allows attackers to execute arbitrary code via a crafted PHP file.
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Analysis
by VulDB Data Team • 04/07/2023
The CVE-2023-26823 vulnerability represents a critical arbitrary file upload flaw within the shopEx EcShop e-commerce platform version 4.1.5 specifically targeting the /admin/template.php administrative component. This vulnerability stems from insufficient input validation and file type checking mechanisms that fail to properly sanitize user-supplied file uploads. The flaw allows authenticated attackers with administrative privileges to upload malicious PHP files directly to the server, potentially enabling remote code execution and complete system compromise. The vulnerability exists due to inadequate restrictions on file extensions and content validation, creating an attack surface where malicious payloads can be executed within the web application context. The impact extends beyond simple file uploads as it provides attackers with the ability to establish persistent backdoors, exfiltrate sensitive data, or deploy additional malicious tools within the compromised environment. This type of vulnerability is classified under CWE-434 as an Unrestricted Upload of File with Dangerous Type, which directly maps to the ATT&CK technique T1195.001 for Content Injection and T1059.007 for Command and Scripting Interpreter. The vulnerability demonstrates a fundamental failure in the principle of least privilege and input validation, as the application does not properly verify the integrity and type of uploaded files before storing them on the server. Attackers can exploit this by crafting a PHP file with malicious code and uploading it through the template management interface, bypassing normal security controls that should prevent such operations. The vulnerability is particularly dangerous because it affects the administrative backend, which typically has elevated privileges and access to sensitive system resources. The exploitation process involves uploading a PHP shell or webshell that can be executed directly through the web server, providing attackers with a persistent foothold for further reconnaissance and lateral movement within the network. Organizations using shopEx EcShop v4.1.5 are at significant risk as this vulnerability can lead to complete system compromise, data breaches, and potential regulatory compliance violations. The lack of proper file type restrictions and content validation creates a direct pathway for attackers to execute arbitrary code on the target system. This vulnerability aligns with ATT&CK technique T1078.004 for Valid Accounts and T1566.001 for Phishing, as attackers often need to first gain administrative access before exploiting this specific flaw. The vulnerability's exploitation requires minimal technical skill and can be automated, making it particularly attractive to threat actors seeking to compromise e-commerce platforms. Organizations should implement immediate mitigations including patching the application to the latest version, implementing strict file upload validation, and restricting administrative access to only trusted users. The vulnerability highlights the critical importance of secure file handling practices and proper input validation in web applications, as it directly violates security best practices outlined in OWASP Top Ten and NIST cybersecurity guidelines. Regular security assessments and penetration testing should be conducted to identify similar vulnerabilities in other components of the application stack. The presence of such vulnerabilities in widely-used e-commerce platforms like shopEx EcShop demonstrates the need for continuous security monitoring and prompt patch management to prevent exploitation by malicious actors.