Overview
CVE-2025-65806 details a critical vulnerability discovered in the E-POINT CMS’s file upload functionality, specifically within the eagle.gsam-1169.1 component. This vulnerability allows a remote attacker to achieve Remote Code Execution (RCE) by uploading a specially crafted, nested ZIP archive. The CMS’s insufficient validation of archive contents allows the extraction of malicious files, such as webshells, into web-accessible directories.
Technical Details
The core of the vulnerability lies in the CMS’s improper handling of nested archive files. An attacker can craft a malicious ZIP archive containing another ZIP archive. The inner ZIP archive contains an executable file, commonly a PHP webshell (e.g., webshell.php). When the E-POINT CMS processes the initial ZIP file, it extracts the inner ZIP file. Critically, the CMS then proceeds to extract the contents of this inner ZIP archive without sufficient validation or sanitization. This leads to the webshell.php file being placed within a directory accessible through the web server. Once uploaded and extracted, the attacker can then access the webshell through a web browser, enabling them to execute arbitrary code on the server.
The vulnerability is caused by two main factors:
- Insufficient Validation of Archive Contents: The CMS lacks robust checks to verify the types and contents of files within the uploaded archives, allowing executable files to be included.
- Inadequate Restriction of Extraction Targets: The CMS does not properly restrict the directories where extracted files can be placed, leading to the potential for malicious files to be extracted into web-accessible areas.
CVSS Analysis
Unfortunately, a CVSS score for CVE-2025-65806 is currently unavailable (N/A). However, based on the nature of the vulnerability and its potential impact, it would likely be classified as Critical. The ability to achieve Remote Code Execution (RCE) without authentication typically warrants the highest severity rating.
Factors contributing to a potential high CVSS score include:
- Remote Attack Vector: The vulnerability can be exploited remotely.
- Low Attack Complexity: The complexity of exploiting this vulnerability may be considered low depending on the ease of crafting the malicious ZIP archive.
- No Privileges Required: Exploitation doesn’t necessarily require user authentication.
- Complete Confidentiality Impact: An attacker can potentially access sensitive data.
- Complete Integrity Impact: An attacker can modify system files and data.
- Complete Availability Impact: An attacker can cause a denial-of-service condition.
Possible Impact
The successful exploitation of CVE-2025-65806 can have severe consequences for E-POINT CMS users:
- Remote Code Execution (RCE): Attackers can execute arbitrary code on the server, potentially gaining complete control of the system.
- Data Disclosure: Attackers can access sensitive data stored on the server, including user credentials, financial information, and proprietary data.
- Account Compromise: Attackers can compromise user accounts and gain unauthorized access to the CMS.
- System Compromise: Attackers can further compromise the entire system, potentially installing malware, creating backdoors, and launching attacks on other systems.
Mitigation and Patch Steps
To mitigate the risk of CVE-2025-65806, the following steps are recommended:
- Apply the Security Patch: The primary mitigation is to apply the official security patch provided by E-POINT. Check the E-POINT website for the latest updates.
- Input Validation and Sanitization: Implement strict input validation and sanitization on all uploaded files. Specifically, validate file types, file sizes, and file contents. Reject any files that do not meet the expected criteria.
- Archive Content Inspection: Thoroughly inspect the contents of uploaded archives before extraction. Check for executable files and prevent their extraction.
- Restricted Extraction Directories: Restrict the directories where uploaded files can be extracted. Ensure that extracted files are not placed in web-accessible directories.
- Web Server Configuration: Configure the web server to prevent the execution of scripts in upload directories.
- Regular Security Audits: Conduct regular security audits of the E-POINT CMS installation to identify and address potential vulnerabilities.
