CVE-2025-2640: PHPGurukul Doctor Appointment SQL Injection

CVE-2025-2640 Overview

A critical SQL Injection vulnerability has been identified in PHPGurukul Doctor Appointment Management System version 1.0. The vulnerability exists in the file /doctor/appointment-bwdates-reports-details.php where the fromdate and todate parameters are not properly sanitized before being used in SQL queries. This allows remote attackers to inject malicious SQL commands and potentially compromise the entire database, including sensitive patient and appointment information.

Critical Impact

Remote attackers can exploit this SQL Injection vulnerability to extract, modify, or delete sensitive healthcare data including patient records, appointment details, and administrative credentials without authentication.

Affected Products

• PHPGurukul Doctor Appointment Management System 1.0
• Web applications using vulnerable appointment-bwdates-reports-details.php component

Discovery Timeline

• 2025-03-23 - CVE-2025-2640 published to NVD
• 2025-04-02 - Last updated in NVD database

Technical Details for CVE-2025-2640

Vulnerability Analysis

This SQL Injection vulnerability (CWE-89) stems from improper neutralization of special elements used in SQL commands. The vulnerable endpoint /doctor/appointment-bwdates-reports-details.php accepts user-supplied date parameters (fromdate and todate) and incorporates them directly into SQL queries without adequate input validation or parameterized queries.

Healthcare management systems like this one typically store highly sensitive Protected Health Information (PHI), making SQL Injection vulnerabilities particularly dangerous. Successful exploitation could allow attackers to bypass authentication, access patient medical records, extract personally identifiable information (PII), or perform administrative actions on the database.

The vulnerability is classified under both 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), indicating that user input flows directly into database operations without proper sanitization.

Root Cause

The root cause of this vulnerability is the failure to implement proper input validation and parameterized queries for the date filter parameters in the appointment reports functionality. The application directly concatenates user-supplied fromdate and todate values into SQL query strings, allowing attackers to break out of the intended query structure and inject arbitrary SQL commands.

PHP applications are particularly susceptible to this type of vulnerability when using legacy database access patterns such as direct string concatenation with mysql_query() or mysqli_query() functions instead of prepared statements with bound parameters.

Attack Vector

The attack can be executed remotely over the network without requiring any authentication or user interaction. An attacker can craft malicious HTTP requests to the vulnerable endpoint, manipulating the fromdate or todate parameters to inject SQL commands.

The exploitation mechanism involves submitting specially crafted date values that contain SQL syntax, allowing the attacker to:

1. Extract database contents using UNION-based or blind SQL injection techniques
2. Bypass authentication by manipulating query logic
3. Modify or delete database records
4. Potentially execute operating system commands if database permissions allow

The exploit has been publicly disclosed, increasing the likelihood of exploitation in the wild. Attackers targeting healthcare management systems may seek to extract sensitive patient data for identity theft, insurance fraud, or ransomware operations.

Detection Methods for CVE-2025-2640

Indicators of Compromise

• Unusual SQL error messages in web server logs containing syntax errors or unexpected query failures
• HTTP requests to /doctor/appointment-bwdates-reports-details.php containing SQL keywords such as UNION, SELECT, OR, AND, --, or single quotes in the fromdate or todate parameters
• Database logs showing unexpected queries, data extraction attempts, or queries with abnormal execution patterns
• Anomalous outbound data transfers from the database server

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block SQL injection patterns in HTTP parameters
• Implement application-level logging to capture all database queries and flag those containing suspicious SQL syntax
• Configure intrusion detection systems (IDS) to alert on requests matching SQL injection signatures targeting date parameters
• Enable database audit logging to track unusual query patterns, failed queries, or unauthorized data access attempts

Monitoring Recommendations

• Monitor web server access logs for repeated requests to the vulnerable endpoint with varying parameter payloads
• Set up alerts for database errors related to malformed SQL queries or injection attempts
• Track database query performance metrics for anomalies indicating data exfiltration
• Implement real-time monitoring of the /doctor/ directory for suspicious access patterns

How to Mitigate CVE-2025-2640

Immediate Actions Required

• Restrict access to /doctor/appointment-bwdates-reports-details.php using web server access controls until a patch is applied
• Implement input validation on the fromdate and todate parameters to accept only properly formatted date values
• Deploy WAF rules to block SQL injection attempts targeting this application
• Review database permissions and ensure the application uses a least-privilege database account
• Back up all data and review database logs for signs of previous exploitation

Patch Information

No official vendor patch has been released for this vulnerability at the time of publication. Organizations using PHPGurukul Doctor Appointment Management System should monitor the PHPGurukul website for security updates. Additional technical information can be found in the GitHub CVE Issue Discussion and VulDB #300641.

Workarounds

• Implement server-side input validation to ensure date parameters conform to expected formats (e.g., YYYY-MM-DD) and reject any input containing SQL metacharacters
• Modify the vulnerable PHP code to use prepared statements with parameterized queries instead of direct string concatenation
• Deploy a reverse proxy or WAF to filter malicious requests before they reach the application
• Consider temporarily disabling the appointment reports functionality until proper fixes can be implemented
• Implement network segmentation to limit database access from web-facing components

# Example Apache .htaccess restriction for vulnerable endpoint
<Files "appointment-bwdates-reports-details.php">
    # Restrict access to trusted IP addresses only
    Require ip 192.168.1.0/24
    Require ip 10.0.0.0/8
</Files>