CVE-2025-5226: Phpgurukul Small CRM SQLi Vulnerability

CVE-2025-5226 Overview

A SQL Injection vulnerability has been discovered in PHPGurukul Small CRM version 3.0, specifically affecting the /admin/change-password.php file. The vulnerability exists due to improper sanitization of the oldpass parameter, allowing attackers to inject malicious SQL statements that can manipulate database queries. This flaw enables remote attackers to potentially access, modify, or delete sensitive data stored in the CRM database without requiring authentication.

Critical Impact

Remote attackers can exploit this SQL Injection vulnerability to bypass authentication mechanisms, extract sensitive customer data, and potentially compromise the entire CRM database through the unvalidated oldpass parameter in the change password functionality.

Affected Products

• PHPGurukul Small CRM 3.0
• phpgurukul small_crm (all installations running version 3.0)

Discovery Timeline

• 2025-05-27 - CVE-2025-5226 published to NVD
• 2025-06-10 - Last updated in NVD database

Technical Details for CVE-2025-5226

Vulnerability Analysis

This SQL Injection vulnerability affects the password change functionality within the administrative interface of PHPGurukul Small CRM. The vulnerable endpoint at /admin/change-password.php fails to properly validate and sanitize the oldpass parameter before incorporating it into SQL queries. This allows attackers to craft malicious input that modifies the intended query logic, potentially enabling unauthorized data access or manipulation.

The vulnerability can be exploited remotely over the network without requiring any user interaction. The attack requires no special privileges and has low complexity, making it accessible to a wide range of threat actors. While the immediate impact on confidentiality, integrity, and availability is characterized as low for each individual aspect, the combined exploitation potential poses a significant risk to organizations using this CRM system.

Root Cause

The root cause of this vulnerability stems from improper input validation (CWE-74: Injection). The application directly incorporates user-supplied data from the oldpass parameter into database queries without proper sanitization or parameterized query implementation. This classic injection flaw allows attacker-controlled data to be interpreted as SQL commands rather than data values.

The lack of prepared statements or parameterized queries in the PHP code handling password verification creates a direct pathway for SQL injection attacks. Additionally, the CVE description indicates that other parameters in this functionality may also be similarly vulnerable.

Attack Vector

The attack vector is network-based, allowing remote exploitation without physical access to the target system. An attacker can target the /admin/change-password.php endpoint by submitting specially crafted requests with malicious SQL syntax in the oldpass parameter.

The exploitation flow typically involves:

1. Identifying the vulnerable endpoint at /admin/change-password.php
2. Crafting SQL injection payloads targeting the oldpass parameter
3. Submitting the malicious request to manipulate the underlying SQL query
4. Extracting data, bypassing authentication, or modifying database records depending on the payload used

The exploit has been publicly disclosed, which increases the urgency for remediation. For technical details on the vulnerability, refer to the GitHub Issue Discussion and the VulDB entry #310324.

Detection Methods for CVE-2025-5226

Indicators of Compromise

• Unusual HTTP POST requests to /admin/change-password.php containing SQL metacharacters such as single quotes, double dashes, semicolons, or UNION keywords in the oldpass parameter
• Database error messages appearing in application logs or HTTP responses indicating malformed SQL queries
• Unexpected database query patterns or execution times in database audit logs
• Evidence of data exfiltration attempts through time-based or error-based SQL injection techniques

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block SQL injection patterns targeting the oldpass parameter and related form fields
• Enable detailed logging on the web server to capture all requests to /admin/change-password.php with full request body content
• Implement database query monitoring to alert on suspicious SQL patterns including UNION SELECT, OR 1=1, and comment sequences
• Configure intrusion detection systems (IDS) with signatures specific to SQL injection attack patterns

Monitoring Recommendations

• Monitor web server access logs for repeated failed password change attempts or anomalous request patterns to administrative endpoints
• Set up real-time alerts for database errors that may indicate SQL injection attempts
• Track network traffic for unusual data transfers that could indicate successful data exfiltration
• Review application logs regularly for signs of exploitation attempts or successful breaches

How to Mitigate CVE-2025-5226

Immediate Actions Required

• Restrict access to the /admin/change-password.php endpoint by implementing IP-based access controls or VPN requirements
• Consider temporarily disabling the password change functionality until a patch is available or code can be remediated
• Deploy WAF rules specifically targeting SQL injection attacks on the affected endpoint
• Audit database logs for any signs of prior exploitation attempts

Patch Information

No official vendor patch information is currently available for CVE-2025-5226. Organizations using PHPGurukul Small CRM 3.0 should monitor the PHPGurukul website for security updates. In the absence of an official patch, implementing the workarounds below is strongly recommended to reduce exposure.

For additional vulnerability details, refer to the VulDB CTI entry and VulDB submission #583408.

Workarounds

• Implement input validation and parameterized queries by modifying the source code to use prepared statements for all database interactions involving user input
• Deploy a reverse proxy or WAF with SQL injection filtering enabled to inspect and block malicious requests before they reach the application
• Restrict network access to the administrative interface to trusted IP addresses only using firewall rules or .htaccess configurations
• Consider migrating to a more actively maintained CRM solution if PHPGurukul does not release timely security patches

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