CVE-2025-4771 Overview
A critical SQL injection vulnerability has been identified in PHPGurukul Online Course Registration version 3.1. The vulnerability exists in the /admin/course.php file, where improper handling of the coursecode parameter allows attackers to inject malicious SQL statements. This flaw enables remote attackers to manipulate database queries, potentially leading to unauthorized data access, data modification, or complete database compromise.
Critical Impact
Remote attackers can exploit this SQL injection vulnerability to bypass authentication, extract sensitive data, modify or delete database records, and potentially gain administrative access to the web application without any authentication requirements.
Affected Products
- PHPGurukul Online Course Registration 3.1
- Admin panel component (/admin/course.php)
- Course management functionality via coursecode parameter
Discovery Timeline
- 2025-05-16 - CVE-2025-4771 published to NVD
- 2025-05-21 - Last updated in NVD database
Technical Details for CVE-2025-4771
Vulnerability Analysis
This SQL injection vulnerability affects the course management functionality within the administrative interface of PHPGurukul Online Course Registration. The application fails to properly sanitize user-supplied input in the coursecode parameter before incorporating it into SQL queries executed against the backend database.
The vulnerability is classified under CWE-89 (Improper Neutralization of Special Elements used in an SQL Command) and CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component). The attack can be launched remotely over the network without requiring any prior authentication or user interaction, making it particularly dangerous for exposed installations.
Root Cause
The root cause of this vulnerability is the lack of proper input validation and parameterized queries in the /admin/course.php file. The coursecode parameter is directly concatenated into SQL query strings without sanitization, escaping, or the use of prepared statements. This allows attackers to break out of the intended query context and inject arbitrary SQL commands.
Attack Vector
The vulnerability can be exploited remotely via the network by sending specially crafted HTTP requests to the /admin/course.php endpoint. An attacker can manipulate the coursecode parameter to inject SQL syntax that alters the query logic. Common exploitation techniques include:
- Union-based injection to extract data from other database tables
- Boolean-based blind injection to enumerate database contents
- Time-based blind injection when direct output is not visible
- Stacked queries (if supported) to execute additional SQL statements including INSERT, UPDATE, or DELETE operations
The exploit has been publicly disclosed and documented in the GitHub Issue Discussion, increasing the risk of active exploitation in the wild.
Detection Methods for CVE-2025-4771
Indicators of Compromise
- Unusual or malformed requests to /admin/course.php containing SQL syntax in the coursecode parameter
- Database query errors or exceptions logged by the application
- Unexpected database access patterns or queries against system tables
- Signs of data exfiltration or unauthorized data modifications in course-related tables
Detection Strategies
- Implement Web Application Firewall (WAF) rules to detect SQL injection patterns in HTTP request parameters
- Monitor application and database logs for suspicious query patterns containing SQL keywords like UNION, SELECT, OR 1=1, --, or '
- Deploy intrusion detection systems with signatures for common SQL injection attack patterns
- Enable database query logging and alert on queries targeting system tables or metadata
Monitoring Recommendations
- Configure real-time alerting for requests to /admin/course.php with anomalous parameter values
- Establish baseline metrics for normal database query patterns and alert on deviations
- Monitor for authentication anomalies that may indicate successful exploitation leading to account compromise
- Review access logs for repeated requests to the vulnerable endpoint from single IP addresses
How to Mitigate CVE-2025-4771
Immediate Actions Required
- Restrict access to the /admin/course.php endpoint using IP whitelisting or VPN requirements
- Deploy Web Application Firewall rules to block SQL injection attempts targeting the coursecode parameter
- If possible, disable or remove the Online Course Registration application until a patch is available
- Implement additional authentication layers for administrative functions
Patch Information
As of the last NVD update on 2025-05-21, no official vendor patch has been released by PHPGurukul. Administrators should monitor the PHPGurukul website for security updates and apply any patches immediately when available. Technical details about this vulnerability are available in the VulDB entry #309072.
Workarounds
- Implement input validation to reject special characters and SQL keywords in the coursecode parameter
- Modify the vulnerable code to use parameterized queries or prepared statements instead of string concatenation
- Place the application behind a reverse proxy with SQL injection filtering capabilities
- Consider implementing a code-level fix by sanitizing all user inputs with appropriate escaping functions
# Example: Apache mod_security rule to block SQL injection attempts
SecRule ARGS:coursecode "@detectSQLi" \
"id:1001,\
phase:2,\
deny,\
status:403,\
msg:'SQL Injection attempt detected in coursecode parameter',\
logdata:'%{MATCHED_VAR}'"
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
