CVE-2025-7129: Campcodes Payroll System SQLi Vulnerability

CVE-2025-7129 Overview

A critical SQL injection vulnerability has been identified in Campcodes Payroll Management System version 1.0. This issue affects the file /ajax.php?action=delete_employee_attendance_single, where improper handling of the ID argument allows attackers to inject malicious SQL queries. The vulnerability can be exploited remotely without authentication, potentially compromising the entire database containing sensitive employee and payroll information.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability to read, modify, or delete sensitive payroll data, extract confidential employee information, or potentially gain further access to the underlying database server.

Affected Products

• Campcodes Payroll Management System 1.0

Discovery Timeline

• 2025-07-07 - CVE-2025-7129 published to NVD
• 2025-07-08 - Last updated in NVD database

Technical Details for CVE-2025-7129

Vulnerability Analysis

This SQL injection vulnerability exists due to insufficient input validation in the employee attendance deletion functionality. The affected endpoint /ajax.php?action=delete_employee_attendance_single fails to properly sanitize the ID parameter before incorporating it into SQL queries. This classic injection vulnerability allows attackers to manipulate database queries by injecting malicious SQL code through the unvalidated parameter.

The vulnerability is particularly concerning because it exists in a payroll management system, which typically stores highly sensitive data including employee personal information, salary details, bank account numbers, and tax information. Successful exploitation could lead to complete database compromise, data exfiltration, or manipulation of financial records.

Root Cause

The root cause is classified under CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component), specifically manifesting as SQL injection. The application fails to implement proper input validation, parameterized queries, or prepared statements when processing the ID parameter in attendance deletion requests. User-supplied input is directly concatenated into SQL queries without sanitization, enabling injection attacks.

Attack Vector

The attack can be initiated remotely over the network without requiring any authentication or user interaction. An attacker can craft malicious HTTP requests to the vulnerable endpoint, manipulating the ID parameter to inject arbitrary SQL commands.

The vulnerable endpoint processes attendance deletion requests through the ID parameter. When a request is made to /ajax.php?action=delete_employee_attendance_single, the application takes the ID value and directly incorporates it into a database query without proper sanitization. An attacker can append SQL syntax such as ' OR '1'='1 or use UNION-based injection techniques to extract data from other tables. Since the exploit has been publicly disclosed, technical details are available through the GitHub CVE Issue Discussion.

Detection Methods for CVE-2025-7129

Indicators of Compromise

• HTTP requests to /ajax.php?action=delete_employee_attendance_single containing SQL metacharacters such as single quotes, double dashes, or UNION keywords in the ID parameter
• Unusual database errors or stack traces appearing in web server logs related to attendance deletion functionality
• Unexpected database query patterns or data access from the attendance-related tables
• Evidence of data exfiltration or unauthorized bulk queries against employee or payroll tables

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block SQL injection patterns in requests to the affected endpoint
• Monitor application logs for requests containing typical SQL injection payloads targeting the ID parameter
• Implement database activity monitoring to detect anomalous queries or unauthorized data access patterns
• Use intrusion detection systems (IDS) with signatures for SQL injection attack patterns

Monitoring Recommendations

• Enable detailed logging for all requests to /ajax.php and related AJAX endpoints
• Configure alerts for database errors that may indicate attempted SQL injection attacks
• Monitor for unusual outbound data transfers that could indicate successful data exfiltration
• Track authentication and access patterns to the payroll management system for anomalies

How to Mitigate CVE-2025-7129

Immediate Actions Required

• Restrict network access to the Campcodes Payroll Management System to trusted IP addresses only
• Implement Web Application Firewall rules to block SQL injection attempts targeting the vulnerable endpoint
• Consider taking the application offline if it contains sensitive data and no patch is available
• Conduct a security audit to identify any evidence of prior exploitation

Patch Information

No official vendor patch has been identified for this vulnerability at the time of publication. Organizations should monitor the CampCodes website for security updates. Additional technical details and community discussion can be found through VulDB #315041.

Workarounds

• Implement input validation on the server-side to sanitize all user-supplied parameters, particularly the ID parameter
• Use parameterized queries or prepared statements for all database operations to prevent SQL injection
• Deploy a reverse proxy or WAF configured to filter malicious SQL injection payloads
• Apply the principle of least privilege to database accounts used by the application to limit potential damage from successful exploitation

# Example: Block access to vulnerable endpoint via Apache configuration
<LocationMatch "/ajax\.php">
    <If "%{QUERY_STRING} =~ /action=delete_employee_attendance_single/">
        Require ip 10.0.0.0/8
        Require ip 192.168.0.0/16
    </If>
</LocationMatch>