CVE-2025-4467: Online Student Clearance System SQLi Flaw

CVE-2025-4467 Overview

A critical SQL injection vulnerability has been identified in SourceCodester Online Student Clearance System version 1.0. This vulnerability exists within the /admin/edit-admin.php file and can be exploited through manipulation of multiple parameters including id, txtfullname, txtemail, and cmddesignation. The vulnerability allows remote attackers to inject malicious SQL statements, potentially compromising the entire database backend and any sensitive student information contained within.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability without authentication to extract, modify, or delete sensitive student and administrative data from the underlying database.

Affected Products

• SourceCodester Online Student Clearance System 1.0
• Senior-walter Online Student Clearance System

Discovery Timeline

• 2025-05-09 - CVE-2025-4467 published to NVD
• 2025-09-30 - Last updated in NVD database

Technical Details for CVE-2025-4467

Vulnerability Analysis

This SQL injection vulnerability stems from improper neutralization of special elements used in SQL commands (CWE-74). The affected endpoint /admin/edit-admin.php fails to properly sanitize user-supplied input before incorporating it into SQL queries. Multiple parameters are vulnerable, including id, txtfullname, txtemail, and cmddesignation, providing attackers with several injection points to exploit.

The network-accessible nature of this vulnerability means that any attacker with network access to the web application can attempt exploitation without requiring any prior authentication or user interaction. This significantly increases the risk profile as the attack surface is exposed to potentially any malicious actor on the network.

Root Cause

The root cause of this vulnerability is the failure to implement proper input validation and parameterized queries in the PHP code handling administrator profile editing functionality. User-controlled input from form fields is directly concatenated into SQL query strings without sanitization, escaping, or the use of prepared statements. This classic SQL injection pattern allows attackers to break out of the intended query context and execute arbitrary SQL commands.

Attack Vector

The attack can be initiated remotely over the network. An attacker would craft malicious HTTP requests to the /admin/edit-admin.php endpoint with specially crafted payloads in the vulnerable parameters. The exploit has been publicly disclosed, meaning technical details and exploitation techniques are available to potential attackers.

Exploitation typically involves inserting SQL syntax characters such as single quotes, boolean operators, or UNION-based injection payloads into the vulnerable parameters. Upon successful injection, attackers could extract sensitive data including student records, administrator credentials, or other confidential information stored in the database. Additionally, depending on database permissions, attackers may be able to modify or delete data, or potentially achieve further system compromise.

For detailed technical information about this vulnerability, refer to the GitHub SQL Vulnerability Overview and VulDB #308086.

Detection Methods for CVE-2025-4467

Indicators of Compromise

• Unusual SQL error messages in web server logs originating from /admin/edit-admin.php
• HTTP requests containing SQL injection patterns such as single quotes, UNION SELECT, OR 1=1, or comment sequences in the id, txtfullname, txtemail, or cmddesignation parameters
• Unexpected database queries or data exfiltration patterns in database audit logs
• Multiple rapid requests to the edit-admin.php endpoint from a single source

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block common SQL injection patterns targeting the vulnerable parameters
• Enable detailed logging on the web server and database to capture suspicious query patterns
• Implement intrusion detection system (IDS) signatures for SQL injection attempts against PHP applications
• Monitor for anomalous database access patterns that could indicate successful exploitation

Monitoring Recommendations

• Review web server access logs for requests to /admin/edit-admin.php with suspicious parameter values
• Enable database query logging and alert on queries containing unexpected syntax or accessing sensitive tables
• Set up real-time alerting for WAF rule triggers related to SQL injection attempts
• Periodically audit database user accounts and permissions for any unauthorized changes

How to Mitigate CVE-2025-4467

Immediate Actions Required

• Remove or restrict network access to the Online Student Clearance System until patching is complete
• Implement Web Application Firewall (WAF) rules to block SQL injection attempts against the vulnerable endpoint
• Review database logs for evidence of prior exploitation and assess potential data breach
• Consider taking the application offline if it contains sensitive student data until proper remediation

Patch Information

As of the last update, no official vendor patch has been released for this vulnerability. Organizations using SourceCodester Online Student Clearance System should monitor SourceCodester for any security updates. Given the public disclosure of this vulnerability and the lack of an official fix, organizations should strongly consider implementing the workarounds below or migrating to a more secure alternative.

Workarounds

• Implement input validation and parameterized queries (prepared statements) in the /admin/edit-admin.php file to prevent SQL injection
• Apply strict allow-list validation on the id, txtfullname, txtemail, and cmddesignation parameters
• Restrict access to the administrative interface using IP-based access controls or VPN requirements
• Implement a Web Application Firewall with SQL injection protection rules as a defense-in-depth measure

# Example Apache .htaccess configuration to restrict admin access by IP
<Files "edit-admin.php">
    Order Deny,Allow
    Deny from all
    Allow from 192.168.1.0/24
    Allow from 10.0.0.0/8
</Files>