CVE-2022-30007 in GXCMS
Summary
by MITRE • 05/17/2022
GXCMS V1.5 has a file upload vulnerability in the background. The vulnerability is the template management page. You can edit any template content and then rename to PHP suffix file, after calling PHP file can control the server.
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Analysis
by VulDB Data Team • 05/25/2022
The vulnerability identified as CVE-2022-30007 affects GXCMS V1.5, a content management system that exposes a critical file upload flaw within its administrative interface. This vulnerability specifically resides in the template management functionality, where attackers can exploit insufficient input validation and file handling mechanisms to upload malicious files with php extensions. The flaw represents a classic server-side file upload vulnerability that allows remote code execution capabilities.
The technical implementation of this vulnerability stems from inadequate sanitization of file names and content during the template editing process. When administrators access the template management page, the system fails to properly validate or restrict file extensions, permitting the upload of files with .php suffixes. This weakness enables attackers to upload web shells or malicious scripts that can be executed within the web server context, effectively granting them persistent access to the underlying system. The vulnerability aligns with CWE-434, which describes insecure file upload scenarios where applications accept files without proper validation of their content or extension.
The operational impact of this vulnerability is severe and multifaceted, as it provides attackers with complete server compromise capabilities. Once a malicious PHP file is successfully uploaded and executed, threat actors can perform arbitrary code execution, escalate privileges, and establish persistent backdoors within the compromised environment. This vulnerability can be leveraged for data exfiltration, system reconnaissance, and further lateral movement within network infrastructure. The attack surface is particularly concerning because it requires no special privileges to exploit, making it accessible to attackers with basic knowledge of web application exploitation techniques. The ATT&CK framework categorizes this vulnerability under T1190 - Exploit Public-Facing Application and T1059 - Command and Scripting Interpreter, highlighting the execution and persistence aspects of such attacks.
Mitigation strategies for CVE-2022-30007 should prioritize immediate patching of the GXCMS V1.5 application to address the template management validation flaws. Organizations must implement strict file extension validation and content inspection mechanisms to prevent php file uploads. Additional protective measures include restricting file upload functionality to authenticated administrators only, implementing proper file name sanitization, and deploying web application firewalls to detect and block malicious upload attempts. Network segmentation and monitoring solutions should be employed to detect unauthorized file upload activities and anomalous execution patterns. Regular security assessments and vulnerability scanning should be conducted to identify similar weaknesses in other applications within the attack surface. The vulnerability also emphasizes the importance of principle of least privilege in web application security, where administrative functions should be properly restricted and monitored to prevent unauthorized access to critical system components.