CVE-2025-34506 in WBCE
Summary
by MITRE • 12/12/2025
WBCE CMS version 1.6.3 and prior contains an authenticated remote code execution vulnerability that allows administrators to upload malicious modules. Attackers can craft a specially designed ZIP module with embedded PHP reverse shell code to gain remote system access when the module is installed.
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Analysis
by VulDB Data Team • 12/16/2025
The vulnerability identified as CVE-2025-34506 represents a critical authenticated remote code execution flaw within WBCE CMS versions 1.6.3 and earlier. This vulnerability specifically targets the module upload and installation functionality, creating a pathway for attackers to execute arbitrary code on the affected system. The flaw exists in the way the CMS handles module installations, particularly when processing ZIP archives containing malicious payloads. The vulnerability is authenticated, meaning an attacker must first obtain administrative credentials, but once achieved, it provides complete system compromise capabilities.
The technical implementation of this vulnerability stems from insufficient input validation and sanitization during the module installation process. When administrators upload and install modules through the CMS interface, the system fails to properly validate the contents of ZIP archives before extraction and execution. Attackers can exploit this by creating specially crafted ZIP files that contain PHP reverse shell code or other malicious payloads. The vulnerability manifests when the CMS extracts and processes these modules, executing the embedded code with the privileges of the web server process. This type of vulnerability maps directly to CWE-434 which describes insecure handling of upload files, and specifically aligns with CWE-94 which addresses improper execution of code.
The operational impact of CVE-2025-34506 is severe and potentially devastating for affected organizations. Successful exploitation allows attackers to gain full remote system access, enabling them to establish persistent backdoors, exfiltrate sensitive data, escalate privileges, and move laterally within the network. The authenticated nature of the vulnerability means that attackers need only compromise administrative credentials, which can occur through various means including credential stuffing, phishing attacks, or exploitation of other vulnerabilities. Once the malicious module is installed, the attacker can maintain persistent access and control over the compromised CMS instance. This vulnerability directly maps to several ATT&CK techniques including T1059 for execution and T1078 for valid accounts, creating a comprehensive attack vector that can be leveraged for extended compromise.
Organizations should implement immediate mitigations to address this vulnerability including updating to the latest WBCE CMS version where the issue has been resolved. The patch addresses the module upload validation by implementing proper content sanitization and file type checking during the installation process. Additionally, administrators should enforce strict access controls and implement multi-factor authentication for administrative accounts to reduce the risk of credential compromise. Network segmentation and monitoring should be enhanced to detect suspicious module installation activities. Security teams should also conduct thorough audits of installed modules and remove any potentially compromised components. The vulnerability demonstrates the importance of secure coding practices and proper input validation, particularly in content management systems where users can upload and execute code. Organizations should also consider implementing web application firewalls and file integrity monitoring to provide additional layers of protection against similar vulnerabilities in the future.