CVE-2025-4699: Apartment Visitors Management SQLI Flaw

CVE-2025-4699 Overview

A SQL injection vulnerability has been identified in PHPGurukul Apartment Visitors Management System version 1.0. This vulnerability affects the file /admin/visitors-form.php, where improper handling of the Category parameter allows attackers to inject malicious SQL commands. The vulnerability can be exploited remotely without authentication, potentially compromising the integrity and confidentiality of the application's database.

Critical Impact

Unauthenticated remote attackers can exploit this SQL injection vulnerability to read, modify, or delete sensitive data in the underlying database, potentially leading to complete compromise of apartment visitor records and administrative credentials.

Affected Products

• PHPGurukul Apartment Visitors Management System 1.0

Discovery Timeline

• 2025-05-15 - CVE-2025-4699 published to NVD
• 2025-05-28 - Last updated in NVD database

Technical Details for CVE-2025-4699

Vulnerability Analysis

This SQL injection vulnerability (CWE-89) exists in the Apartment Visitors Management System's administrative interface, specifically within the visitor form processing functionality. The application fails to properly sanitize user-supplied input in the Category parameter before incorporating it into SQL queries. This represents a classic injection flaw (CWE-74) where untrusted data is concatenated directly into database commands.

The vulnerability is particularly concerning because it resides in an administrative endpoint (/admin/visitors-form.php), which typically handles sensitive visitor information for apartment complexes. Successful exploitation could allow attackers to extract personal data of residents and visitors, manipulate visitor logs, or escalate to administrative access.

Root Cause

The root cause of this vulnerability is the lack of proper input validation and parameterized query usage when processing the Category parameter. The application directly incorporates user-supplied data into SQL statements without sanitization, prepared statements, or parameterized queries. This architectural flaw allows malicious SQL syntax to be interpreted as executable database commands rather than treated as literal data values.

Attack Vector

The attack is network-based and can be initiated remotely without requiring authentication or user interaction. An attacker can craft malicious HTTP requests to the /admin/visitors-form.php endpoint with specially crafted Category parameter values containing SQL injection payloads.

The exploitation flow involves sending requests with SQL metacharacters and commands embedded in the Category parameter. When the vulnerable application processes this input, the injected SQL is executed against the backend database. This can be leveraged for data extraction using UNION-based techniques, blind SQL injection for data exfiltration, or database manipulation through INSERT, UPDATE, or DELETE operations.

Detection Methods for CVE-2025-4699

Indicators of Compromise

• Unusual HTTP requests to /admin/visitors-form.php containing SQL syntax characters such as single quotes, semicolons, or SQL keywords in the Category parameter
• Database error messages appearing in application logs or responses indicating SQL syntax errors
• Unexpected database queries with UNION SELECT, OR 1=1, or time-based delay functions in query logs
• Anomalous data access patterns or bulk data extraction from visitor-related database tables

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block common SQL injection patterns targeting the Category parameter
• Monitor application logs for repeated requests to /admin/visitors-form.php with unusual parameter values
• Enable database query logging and alert on queries containing injection indicators such as stacked queries or UNION operations
• Deploy intrusion detection signatures for SQL injection attempts against PHP applications

Monitoring Recommendations

• Configure real-time alerting for HTTP requests containing SQL injection payloads directed at the vulnerable endpoint
• Establish baseline query patterns for the application database and alert on deviations
• Monitor for authentication bypass attempts or unauthorized access to administrative functions
• Review database audit logs for data exfiltration patterns or unauthorized data modifications

How to Mitigate CVE-2025-4699

Immediate Actions Required

• Restrict access to the /admin/visitors-form.php endpoint using IP whitelisting or VPN requirements until a patch is available
• Deploy WAF rules specifically targeting SQL injection attempts against the Category parameter
• Consider temporarily disabling the vulnerable functionality if operationally feasible
• Audit database access logs to determine if the vulnerability has already been exploited

Patch Information

As of the last update, no official patch has been released by PHPGurukul for this vulnerability. Organizations using the Apartment Visitors Management System should monitor the PHP Gurukul Homepage for security updates. Additional technical details and vulnerability tracking information is available through VulDB #308998 and the GitHub Issue Report.

Workarounds

• Implement input validation at the web server level to reject requests containing SQL injection characters in the Category parameter
• Use a reverse proxy or WAF to filter and sanitize incoming requests before they reach the application
• Apply the principle of least privilege to database accounts, ensuring the application uses credentials with minimal required permissions
• Isolate the application server and database in a segmented network to limit the blast radius of potential exploitation

# Example WAF rule for ModSecurity to block SQL injection in Category parameter
SecRule ARGS:Category "@detectSQLi" \
  "id:100001,\
  phase:2,\
  deny,\
  status:403,\
  log,\
  msg:'SQL Injection detected in Category parameter - CVE-2025-4699'"