CVE-2025-7535: Sales And Inventory System SQLi Flaw

CVE-2025-7535 Overview

A critical SQL injection vulnerability has been identified in Campcodes Sales and Inventory System version 1.0. The vulnerability exists in the /pages/reprint_cash.php file, where improper handling of the sid parameter allows attackers to inject malicious SQL commands. This flaw enables remote attackers to manipulate database queries without authentication, potentially leading to unauthorized data access, modification, or deletion.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability to extract sensitive business data, modify inventory records, or potentially gain further access to the underlying database server.

Affected Products

• Campcodes Sales and Inventory System 1.0

Discovery Timeline

• 2025-07-13 - CVE-2025-7535 published to NVD
• 2025-07-16 - Last updated in NVD database

Technical Details for CVE-2025-7535

Vulnerability Analysis

This SQL injection vulnerability stems from inadequate input validation in the reprint_cash.php file of the Campcodes Sales and Inventory System. The sid parameter is passed directly to SQL queries without proper sanitization or parameterized query implementation. Since the vulnerability is network-accessible and requires no authentication or user interaction to exploit, it presents a significant risk to organizations running this application. The exploit has been publicly disclosed, increasing the likelihood of opportunistic attacks against unpatched systems.

Root Cause

The root cause of CVE-2025-7535 is classified under CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component), commonly known as injection. The application fails to properly sanitize or escape user-supplied input in the sid parameter before incorporating it into SQL queries. This allows attackers to break out of the intended query structure and inject arbitrary SQL commands that the database will execute with the application's privileges.

Attack Vector

The attack can be launched remotely over the network against the vulnerable endpoint /pages/reprint_cash.php. An attacker crafts malicious input for the sid parameter containing SQL metacharacters and commands. When the application processes this input without proper validation, the injected SQL code is executed against the backend database. No authentication is required, and no user interaction is needed for successful exploitation.

The vulnerability mechanism involves manipulating the sid parameter in requests to the reprint_cash.php endpoint. Attackers can inject SQL syntax that alters the query logic, enabling techniques such as UNION-based injection to extract data from other tables, boolean-based blind injection to infer database contents, or time-based blind injection using database sleep functions. For technical details and proof-of-concept information, refer to the GitHub Issue on CVE.

Detection Methods for CVE-2025-7535

Indicators of Compromise

• Unusual SQL error messages in application logs originating from /pages/reprint_cash.php
• HTTP requests to reprint_cash.php containing SQL keywords (SELECT, UNION, INSERT, DROP, etc.) in the sid parameter
• Database query logs showing abnormal query patterns or unauthorized data access attempts
• Unexpected database modifications to sales or inventory records

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block SQL injection patterns in the sid parameter
• Implement application-level logging to capture all requests to /pages/reprint_cash.php with parameter values
• Configure database audit logging to track unusual query patterns or access to sensitive tables
• Use intrusion detection systems (IDS) with SQL injection signature rules

Monitoring Recommendations

• Monitor web server access logs for requests to /pages/reprint_cash.php containing suspicious characters such as single quotes, double dashes, or semicolons
• Set up alerts for database errors indicating SQL syntax issues from the application
• Review database query logs for UNION SELECT statements or attempts to access system tables
• Implement rate limiting on the vulnerable endpoint to slow potential automated attacks

How to Mitigate CVE-2025-7535

Immediate Actions Required

• Restrict network access to the Campcodes Sales and Inventory System to trusted IP addresses only
• Implement Web Application Firewall rules to filter SQL injection attempts targeting the sid parameter
• Consider temporarily disabling the reprint_cash.php functionality if not critical to operations
• Review database user privileges and apply principle of least privilege to the application's database account

Patch Information

At the time of publication, no official patch has been released by Campcodes for this vulnerability. Organizations should monitor the CampCodes website for security updates. Additional vulnerability details are available through VulDB #316231.

Workarounds

• Implement input validation at the application level to allow only numeric values for the sid parameter
• Deploy a reverse proxy or WAF with SQL injection protection rules in front of the application
• Isolate the database server on a separate network segment with restricted access
• Disable or remove the reprint_cash.php file if the reprint cash functionality is not required

# Example: Apache mod_security rule to block SQL injection in sid parameter
SecRule ARGS:sid "@detectSQLi" \
    "id:1001,\
    phase:2,\
    deny,\
    status:403,\
    msg:'SQL Injection attempt detected in sid parameter',\
    logdata:'Matched Data: %{MATCHED_VAR}'"