CVE-2025-8272: Exam Form Submission SQL Injection Flaw

CVE-2025-8272 Overview

CVE-2025-8272 is a SQL Injection vulnerability affecting code-projects Exam Form Submission version 1.0. The vulnerability exists in the file /admin/update_fst.php where improper handling of the credits parameter allows attackers to inject malicious SQL queries. This flaw enables remote attackers to manipulate database queries without authentication, potentially leading to unauthorized data access, modification, or deletion.

Critical Impact

Remote attackers can exploit this SQL Injection vulnerability to extract sensitive data, modify database contents, or potentially gain unauthorized access to the underlying system through database manipulation.

Affected Products

• code-projects Exam Form Submission 1.0

Discovery Timeline

• 2025-07-28 - CVE-2025-8272 published to NVD
• 2025-07-30 - Last updated in NVD database

Technical Details for CVE-2025-8272

Vulnerability Analysis

This SQL Injection vulnerability occurs in the /admin/update_fst.php file of the Exam Form Submission application. The credits parameter is not properly sanitized before being incorporated into SQL queries, allowing attackers to inject arbitrary SQL commands. The vulnerability is network-accessible and requires no authentication or user interaction to exploit, making it particularly dangerous for exposed instances.

The underlying issue stems from CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component), commonly known as injection. When user-supplied input from the credits parameter is concatenated directly into SQL statements without proper parameterization or escaping, attackers can break out of the intended query context and execute their own SQL commands.

Root Cause

The root cause is a failure to implement proper input validation and parameterized queries in the /admin/update_fst.php file. The application directly incorporates user input from the credits parameter into SQL queries without sanitization, allowing special SQL characters and commands to be interpreted by the database engine. This classic SQL Injection pattern occurs when developers concatenate user input into SQL strings rather than using prepared statements with bound parameters.

Attack Vector

The attack can be initiated remotely over the network against the /admin/update_fst.php endpoint. An attacker crafts a malicious HTTP request containing SQL injection payloads in the credits parameter. The payload exploits the lack of input sanitization to inject additional SQL commands that execute alongside the legitimate query.

Successful exploitation could allow attackers to:

• Extract sensitive information from the database including user credentials and exam data
• Modify or delete database records
• Bypass authentication mechanisms
• Potentially escalate to command execution depending on database configuration

The exploit has been publicly disclosed, increasing the risk of active exploitation. For technical details on the vulnerability, see the GitHub Issue on CVE and VulDB Entry #317861.

Detection Methods for CVE-2025-8272

Indicators of Compromise

• Unusual or malformed requests to /admin/update_fst.php containing SQL syntax characters such as single quotes, semicolons, or SQL keywords
• Database error messages in application logs indicating query syntax errors
• Unexpected database query patterns or excessive data retrieval operations
• Anomalous access patterns to the admin panel from external IP addresses

Detection Strategies

• Implement web application firewall (WAF) rules to detect and block SQL injection patterns in the credits parameter
• Monitor HTTP request logs for suspicious payloads targeting /admin/update_fst.php
• Enable database query logging to identify anomalous or malicious SQL statements
• Deploy intrusion detection systems (IDS) with signatures for common SQL injection attack patterns

Monitoring Recommendations

• Configure alerts for requests to /admin/update_fst.php containing common SQL injection strings such as UNION SELECT, OR 1=1, or comment sequences
• Monitor database audit logs for unauthorized data access or privilege escalation attempts
• Track failed login attempts and unusual authentication patterns that may indicate credential extraction
• Establish baseline metrics for database query volume and alert on significant deviations

How to Mitigate CVE-2025-8272

Immediate Actions Required

• Restrict access to the /admin/update_fst.php endpoint using network-level controls or IP whitelisting
• Implement a web application firewall (WAF) with SQL injection protection rules
• Review application logs for evidence of exploitation attempts
• Consider taking the affected application offline until a patch or workaround is applied

Patch Information

At the time of publication, no official vendor patch has been released for this vulnerability. Organizations should monitor the Code Projects website for security updates and apply patches as soon as they become available. Given the public disclosure of this vulnerability, implementing defensive measures is critical.

Workarounds

• Deploy input validation at the application level to reject requests containing SQL metacharacters in the credits parameter
• Implement prepared statements with parameterized queries in the vulnerable PHP code
• Use a web application firewall (WAF) to filter malicious requests before they reach the application
• Restrict network access to the admin interface to trusted IP addresses only
• If source code modification is possible, sanitize all user inputs using appropriate escaping functions such as mysqli_real_escape_string() or PDO prepared statements

# Example: Apache .htaccess rule to restrict access to admin directory
<Directory "/path/to/app/admin">
    Order Deny,Allow
    Deny from all
    Allow from 192.168.1.0/24
    Allow from 10.0.0.0/8
</Directory>