CVE-2025-8237: Exam Form Submission SQL Injection Flaw

CVE-2025-8237 Overview

A SQL injection vulnerability has been identified in code-projects Exam Form Submission version 1.0. This vulnerability exists in the file /admin/update_s1.php where the credits parameter is not properly sanitized before being used in SQL queries. The vulnerability allows remote attackers to inject malicious SQL statements through the credits parameter, potentially compromising the underlying database.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability to read, modify, or delete sensitive data from the database, potentially leading to full database compromise.

Affected Products

• code-projects Exam Form Submission 1.0

Discovery Timeline

• 2025-07-27 - CVE-2025-8237 published to NVD
• 2025-08-05 - Last updated in NVD database

Technical Details for CVE-2025-8237

Vulnerability Analysis

This SQL injection vulnerability affects the administrative functionality of the Exam Form Submission application. The vulnerable endpoint /admin/update_s1.php processes user-supplied input through the credits parameter without adequate sanitization or parameterized query implementation. When an attacker submits crafted input containing SQL metacharacters, the application directly incorporates this input into database queries, allowing unauthorized database operations.

The vulnerability is classified under CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component), which encompasses injection flaws where user input is not properly validated before being processed by an interpreter.

Root Cause

The root cause of this vulnerability is improper input validation and the lack of parameterized queries in the /admin/update_s1.php file. The credits parameter is directly concatenated into SQL statements without sanitization, escaping, or use of prepared statements. This allows SQL metacharacters to escape the intended query context and execute arbitrary SQL commands.

Attack Vector

The attack can be initiated remotely over the network without requiring authentication. An attacker can craft malicious HTTP requests to the vulnerable /admin/update_s1.php endpoint, injecting SQL payloads through the credits parameter.

The vulnerability manifests when user-supplied data in the credits parameter is processed by the application. Attackers can leverage standard SQL injection techniques including UNION-based injection, boolean-based blind injection, or time-based blind injection to extract data or manipulate the database. For technical details, refer to the GitHub Issue Discussion which contains additional information about the vulnerability.

Detection Methods for CVE-2025-8237

Indicators of Compromise

• Unusual HTTP requests to /admin/update_s1.php containing SQL keywords such as UNION, SELECT, INSERT, UPDATE, or DELETE in the credits parameter
• Database error messages appearing in application logs or responses indicating malformed SQL syntax
• Unexpected database queries or access patterns in database audit logs
• Anomalous data modifications or unauthorized data access in the application database

Detection Strategies

• Implement web application firewall (WAF) rules to detect and block SQL injection patterns targeting the credits parameter
• Monitor HTTP request logs for suspicious patterns including encoded SQL keywords and comment sequences (--, /**/)
• Enable database query logging and alert on queries containing unexpected clauses or syntax
• Deploy intrusion detection systems (IDS) with SQL injection detection signatures

Monitoring Recommendations

• Review access logs for /admin/update_s1.php endpoint for anomalous request patterns
• Configure database monitoring to track unusual query volumes or execution times that may indicate exploitation attempts
• Implement application-level logging to capture parameter values for security analysis

How to Mitigate CVE-2025-8237

Immediate Actions Required

• Restrict access to the /admin/update_s1.php endpoint using IP whitelisting or VPN access controls
• Implement web application firewall rules to filter SQL injection attempts targeting the credits parameter
• Review database user permissions and apply principle of least privilege to minimize potential impact
• Consider temporarily disabling the affected functionality until a patch is available

Patch Information

No official vendor patch has been released at this time. Users should monitor the Code Projects Resource Hub for security updates. Additional technical details and community discussion can be found in the VulDB Entry #317825.

Workarounds

• Apply input validation to sanitize the credits parameter, rejecting any input containing SQL metacharacters
• Modify the vulnerable code to use parameterized queries or prepared statements
• Implement a web application firewall to filter malicious requests before they reach the application
• Restrict network access to administrative endpoints to trusted IP addresses only

# Example: Restrict access to admin directory using .htaccess
# Add to /admin/.htaccess
<Files "update_s1.php">
    Order deny,allow
    Deny from all
    Allow from 192.168.1.0/24
    Allow from 10.0.0.0/8
</Files>