CVE-2025-9502: Campcodes Loan Management System SQLi Flaw

CVE-2025-9502 Overview

A SQL Injection vulnerability has been identified in Campcodes Online Loan Management System version 1.0. This vulnerability affects the /ajax.php?action=save_payment endpoint where manipulation of the loan_id argument allows for SQL injection attacks. The vulnerability can be exploited remotely without authentication, potentially allowing attackers to access, modify, or delete sensitive financial data stored in the application's database.

Critical Impact

Unauthenticated attackers can exploit this SQL injection vulnerability remotely to compromise database integrity, extract sensitive loan and payment information, and potentially gain unauthorized access to the underlying system.

Affected Products

• Campcodes Online Loan Management System version 1.0

Discovery Timeline

• 2025-08-27 - CVE-2025-9502 published to NVD
• 2025-09-02 - Last updated in NVD database

Technical Details for CVE-2025-9502

Vulnerability Analysis

This vulnerability exists in the payment saving functionality of the Campcodes Online Loan Management System. The application fails to properly sanitize user-supplied input in the loan_id parameter before incorporating it into SQL queries. This classic injection weakness (CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component) allows attackers to inject malicious SQL commands that are executed by the database server.

The network-accessible nature of this vulnerability means attackers can exploit it remotely without requiring any prior authentication or user interaction. While the vulnerability allows for partial confidentiality, integrity, and availability impact, the exposure of a financial management system to SQL injection poses significant risks to sensitive loan data and customer information.

Root Cause

The root cause of this vulnerability is the lack of proper input validation and parameterized queries in the /ajax.php file when handling the save_payment action. The loan_id parameter is directly concatenated or interpolated into SQL queries without proper sanitization or use of prepared statements. This allows special SQL characters and commands passed through the parameter to be executed as part of the database query rather than being treated as data.

Attack Vector

The attack can be executed remotely over the network by sending crafted HTTP requests to the vulnerable endpoint. An attacker would manipulate the loan_id parameter in requests to /ajax.php?action=save_payment to inject malicious SQL code. Since no authentication or user interaction is required, any network-accessible instance of this application is at risk. The exploit has been publicly disclosed, making this vulnerability particularly dangerous for organizations running unpatched versions of the software.

The exploitation process typically involves:

1. Identifying the vulnerable endpoint (/ajax.php?action=save_payment)
2. Crafting malicious payloads in the loan_id parameter to test for SQL injection
3. Extracting database information, modifying records, or escalating the attack based on database permissions

Detection Methods for CVE-2025-9502

Indicators of Compromise

• Unusual or malformed requests to /ajax.php?action=save_payment containing SQL keywords or special characters in the loan_id parameter
• Database error messages or unexpected responses from the payment endpoint
• Abnormal database query patterns including UNION SELECT statements, time-based delays, or error-based extraction attempts
• Evidence of data exfiltration or unauthorized database access in application and database logs

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block SQL injection patterns in HTTP requests
• Monitor web server access logs for requests to /ajax.php containing suspicious characters such as single quotes, double dashes, UNION, SELECT, or other SQL keywords
• Enable database query logging and alert on anomalous query patterns or errors
• Deploy intrusion detection systems (IDS) with signatures for SQL injection attack patterns

Monitoring Recommendations

• Configure real-time alerting for repeated failed or suspicious requests to the vulnerable endpoint
• Implement database activity monitoring to detect unauthorized queries or data access
• Review web application logs regularly for evidence of exploitation attempts
• Monitor for changes to database schema or unexpected data modifications in loan and payment tables

How to Mitigate CVE-2025-9502

Immediate Actions Required

• Restrict network access to the Campcodes Online Loan Management System to trusted networks only
• Implement a Web Application Firewall (WAF) to filter malicious SQL injection payloads
• Review application logs for evidence of prior exploitation
• Consider taking the application offline until a proper fix can be applied

Patch Information

As of the last modification date (2025-09-02), no official vendor patch has been identified for this vulnerability. Organizations should monitor the CampCodes website for security updates. Additional technical details about this vulnerability can be found in the GitHub CVE Issue Discussion and VulDB entry #321485.

Workarounds

• Implement input validation on the loan_id parameter to accept only numeric values
• Modify the application code to use parameterized queries or prepared statements instead of string concatenation for SQL queries
• Deploy a WAF with SQL injection protection rules in front of the application
• Restrict database user permissions to limit the impact of successful exploitation
• Apply network segmentation to isolate the application from critical infrastructure

# Example WAF rule to block SQL injection in loan_id parameter
# ModSecurity rule example
SecRule ARGS:loan_id "@detectSQLi" \
    "id:1001,\
    phase:2,\
    block,\
    msg:'SQL Injection attempt detected in loan_id parameter',\
    log,\
    severity:CRITICAL"