CVE-2025-52921

Comprehensive Technical Analysis of CVE-2025-52921

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2025-52921 CVSS Score: 9.9

The vulnerability in Innoshop through version 0.4.1 allows an authenticated attacker to exploit the File Manager functions in the admin panel to achieve remote code execution (RCE) on the server. The attacker can upload a crafted file and rename it to have a .php extension, bypassing the initial check that restricts uploads to image files. This vulnerability is severe due to the potential for full server compromise, leading to data breaches, unauthorized access, and further exploitation.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Authenticated Access: The attacker must have valid credentials to access the admin panel.
• File Upload: The attacker uploads a crafted file, which may initially appear as an image file.
• File Renaming: Using a proxy tool like BurpSuite, the attacker bypasses frontend restrictions to rename the file with a .php extension.
• Code Execution: The attacker triggers the execution of the malicious PHP code via a GET request.

Exploitation Methods:

• Initial Upload: The attacker uploads a file with a benign extension (e.g., .jpg).
• Renaming: The attacker uses a proxy tool to intercept the rename request and change the file extension to .php.
• Execution: The attacker sends a GET request to the renamed file, triggering the execution of the embedded PHP code.

3. Affected Systems and Software Versions

Affected Software:

• Innoshop versions through 0.4.1

Affected Systems:

• Servers running Innoshop versions through 0.4.1
• Any system where the admin panel is accessible to authenticated users

4. Recommended Mitigation Strategies

Immediate Actions:

• Patching: Upgrade to a patched version of Innoshop if available.
• Access Control: Restrict admin panel access to trusted users only.
• Monitoring: Implement monitoring for suspicious file uploads and renaming activities.

Long-Term Strategies:

• Input Validation: Enforce server-side validation for file uploads and renaming.
• File Type Checks: Implement robust checks to ensure uploaded files are genuine image files.
• Security Audits: Conduct regular security audits and code reviews to identify and fix similar vulnerabilities.

5. Impact on Cybersecurity Landscape

This vulnerability highlights the importance of server-side validation and the risks associated with relying solely on frontend checks. It underscores the need for comprehensive security measures, including regular updates, access controls, and continuous monitoring. The high CVSS score of 9.9 indicates the critical nature of the vulnerability, emphasizing the potential for significant damage if exploited.

6. Technical Details for Security Professionals

Technical Overview:

• File Upload Mechanism: The File Manager in Innoshop allows administrators to upload files, with an initial check to ensure they are image files.
• Renaming Function: The renaming function in the admin panel can be manipulated to change file extensions.
• Proxy Tools: Tools like BurpSuite can intercept and modify HTTP requests, bypassing frontend restrictions.

Exploitation Steps:

1. Authenticate: Obtain valid admin credentials.
2. Upload File: Upload a crafted file (e.g., malicious.jpg).
3. Intercept Request: Use a proxy tool to intercept the rename request.
4. Rename File: Change the file extension to .php (e.g., malicious.php).
5. Trigger Execution: Send a GET request to malicious.php to execute the embedded PHP code.

Detection and Prevention:

• Log Analysis: Monitor logs for unusual file uploads and renaming activities.
• Intrusion Detection: Implement intrusion detection systems (IDS) to detect and alert on suspicious activities.
• Web Application Firewalls (WAF): Deploy WAFs to filter out malicious requests and protect against common attack vectors.

Conclusion: CVE-2025-52921 represents a critical vulnerability in Innoshop that can lead to remote code execution. Mitigation strategies include patching, access control, and robust server-side validation. Security professionals should prioritize addressing this vulnerability to protect against potential exploitation and ensure the integrity of their systems.