Executive Summary

CVE-2026-1423 is an unrestricted file upload vulnerability in the code-projects Online Examination System 1.0, specifically in the /admin_pic.php script used for changing the website logo. The system does not restrict the types of files that can be uploaded, allowing an attacker to upload a malicious PHP webshell. This enables remote execution of arbitrary code on the server, potentially compromising the system. [1, 2]

Useful 0 Not Useful 0

Impact Analysis

This vulnerability can lead to remote code execution on the affected server, allowing attackers to compromise the confidentiality, integrity, and availability of the system. Attackers can upload malicious files without authentication, potentially gaining control over the server, stealing data, disrupting services, or using the server for further attacks. [1, 2]

Useful 0 Not Useful 0

Detection Guidance

This vulnerability can be detected by checking for the presence of the vulnerable file /admin_pic.php on your system or web server. Additionally, you can search for signs of exploitation such as uploaded PHP webshell files or unusual file uploads in the directory handling the 'Change Picture' feature. Network detection can include monitoring HTTP requests for file uploads to /admin_pic.php. A suggested command to identify potentially vulnerable endpoints is using Google dorking: searching for "inurl:admin_pic.php" to find exposed instances. On your server, you can use commands like 'find /var/www -name admin_pic.php' to locate the file, and 'grep -iR "upload" /path/to/webroot' to find upload handling code. Monitoring web server logs for POST requests to /admin_pic.php can also help detect exploitation attempts. [2]

Useful 0 Not Useful 0

Mitigation Strategies

Immediate mitigation steps include disabling or restricting access to the /admin_pic.php file to prevent file uploads, especially from untrusted sources. Since no known countermeasures or patches are available, it is recommended to replace the affected product with an alternative secure solution. Additionally, monitoring and blocking suspicious upload attempts and restricting file types accepted by upload features can help reduce risk. Applying network-level protections such as web application firewalls (WAF) to block malicious payloads targeting /admin_pic.php is also advised. [2]

Useful 0 Not Useful 0

Compliance Impact

The provided resources do not specify how this vulnerability affects compliance with common standards and regulations such as GDPR or HIPAA.

Useful 0 Not Useful 0