Description
An arbitrary file upload vulnerability in the component \controller\LocalTemplate.php of FoxCMS v1.2.5 allows attackers to execute arbitrary code via uploading a crafted Zip file.
EPSS Score:
0%
Comprehensive Technical Analysis of EUVD-2025-5357
1. Vulnerability Assessment and Severity Evaluation
The vulnerability described in EUVD-2025-5357 pertains to an arbitrary file upload flaw in the \controller\LocalTemplate.php component of FoxCMS v1.2.5. This vulnerability allows attackers to execute arbitrary code by uploading a specially crafted Zip file. The CVSS (Common Vulnerability Scoring System) base score of 9.8 indicates a critical severity level. The scoring vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H breaks down as follows:
- Attack Vector (AV): Network (N) - The vulnerability can be exploited remotely over the network.
- Attack Complexity (AC): Low (L) - The attack requires minimal skill or resources.
- Privileges Required (PR): None (N) - No special privileges are needed to exploit the vulnerability.
- User Interaction (UI): None (N) - No user interaction is required for the attack to succeed.
- Scope (S): Unchanged (U) - The vulnerability does not affect other systems or components.
- Confidentiality (C): High (H) - The vulnerability can lead to significant data breaches.
- Integrity (I): High (H) - The vulnerability can compromise the integrity of the system.
- Availability (A): High (H) - The vulnerability can cause significant disruption to system availability.
2. Potential Attack Vectors and Exploitation Methods
The primary attack vector involves uploading a malicious Zip file to the FoxCMS application. The attacker can craft a Zip file containing a PHP script or other executable code. Once uploaded, the attacker can trigger the execution of this code, leading to arbitrary code execution on the server.
Potential exploitation methods include:
- Direct Upload: The attacker uploads the crafted Zip file directly through the FoxCMS interface.
- Phishing: The attacker tricks an authorized user into uploading the malicious file.
- Automated Scripts: The attacker uses automated scripts to exploit the vulnerability en masse.
3. Affected Systems and Software Versions
The vulnerability specifically affects FoxCMS v1.2.5. It is crucial to note that other versions of FoxCMS may also be vulnerable if they share the same codebase or components. Organizations using FoxCMS should verify the version they are running and apply the necessary patches or updates.
4. Recommended Mitigation Strategies
To mitigate this vulnerability, the following strategies are recommended:
- Patch Management: Immediately apply the latest security patches provided by FoxCMS.
- Input Validation: Implement strict input validation and sanitization for file uploads.
- File Type Restrictions: Limit the types of files that can be uploaded to only those necessary for legitimate use.
- Antivirus and Anti-malware: Use antivirus and anti-malware solutions to scan uploaded files for malicious content.
- Network Segmentation: Segment the network to limit the potential impact of a successful exploit.
- Regular Audits: Conduct regular security audits and vulnerability assessments to identify and address similar issues.
5. Impact on European Cybersecurity Landscape
The critical nature of this vulnerability poses a significant risk to organizations using FoxCMS within the European Union. Given the high base score and the potential for remote code execution, successful exploitation could lead to data breaches, system compromises, and service disruptions. This underscores the importance of robust cybersecurity measures and timely patch management practices across the EU.
6. Technical Details for Security Professionals
For security professionals, the following technical details are pertinent:
- Vulnerable Component:
\controller\LocalTemplate.php - Exploit Method: Uploading a crafted Zip file containing malicious code.
- Detection: Monitor for unusual file upload activities and unexpected file modifications.
- Response: Implement intrusion detection systems (IDS) and intrusion prevention systems (IPS) to detect and block malicious uploads.
- Remediation: Ensure that the FoxCMS application is updated to the latest version that addresses this vulnerability.
References:
By addressing this vulnerability promptly and comprehensively, organizations can significantly reduce the risk of exploitation and maintain the integrity and security of their systems.