CVE-2025-7536: Campcodes Sales & Inventory SQLi Flaw

CVE-2025-7536 Overview

A critical SQL injection vulnerability has been identified in Campcodes Sales and Inventory System version 1.0. The vulnerability exists in the /pages/receipt_credit.php file, where the sid parameter is not properly sanitized before being used in SQL queries. This allows remote attackers to inject malicious SQL commands, potentially leading to unauthorized data access, modification, or deletion within the application database.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability to extract sensitive business data, manipulate inventory records, or compromise the entire database without authentication.

Affected Products

• Campcodes Sales and Inventory System 1.0

Discovery Timeline

• 2025-07-13 - CVE-2025-7536 published to NVD
• 2025-07-16 - Last updated in NVD database

Technical Details for CVE-2025-7536

Vulnerability Analysis

This SQL injection vulnerability (CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component) affects the receipt credit functionality of the Campcodes Sales and Inventory System. The vulnerable endpoint at /pages/receipt_credit.php accepts a sid parameter that is directly incorporated into database queries without proper input validation or parameterization.

The attack is network-accessible, requiring no authentication or user interaction, which significantly increases the risk of exploitation. An attacker can craft malicious requests containing SQL payloads within the sid parameter to manipulate query logic and extract or modify database contents.

Root Cause

The root cause of this vulnerability is improper input validation in the receipt_credit.php file. The application fails to sanitize or parameterize the sid argument before incorporating it into SQL statements. This classic injection vulnerability allows attackers to break out of the intended query context and inject arbitrary SQL commands that the database will execute with the application's privileges.

Attack Vector

The vulnerability is exploitable remotely via network access. An attacker can send specially crafted HTTP requests to the /pages/receipt_credit.php endpoint with a malicious sid parameter value. Since the vulnerability requires no authentication or privileges, any remote attacker with network access to the application can attempt exploitation.

The exploitation technique involves injecting SQL syntax into the sid parameter to modify the query's behavior. Depending on the database configuration and application context, attackers may be able to extract sensitive data through UNION-based injection, perform blind SQL injection to enumerate database contents, or potentially execute stacked queries to modify or delete data. Technical details regarding exploitation can be found in the GitHub CVE Issue Discussion.

Detection Methods for CVE-2025-7536

Indicators of Compromise

• HTTP requests to /pages/receipt_credit.php containing SQL syntax characters in the sid parameter (e.g., single quotes, UNION, SELECT, OR 1=1)
• Unusual database query patterns or errors logged by the database server
• Unexpected data extraction or modification in sales and inventory records
• Web application firewall alerts for SQL injection patterns targeting the vulnerable endpoint

Detection Strategies

• Deploy web application firewall (WAF) rules to detect and block SQL injection patterns in requests to /pages/receipt_credit.php
• Implement database activity monitoring to identify anomalous queries or unauthorized data access patterns
• Enable detailed logging for the affected endpoint and monitor for suspicious sid parameter values
• Use intrusion detection systems (IDS) with signatures for common SQL injection attack patterns

Monitoring Recommendations

• Monitor web server access logs for requests to /pages/receipt_credit.php with abnormal or lengthy sid parameter values
• Set up alerts for database errors or exceptions that may indicate failed injection attempts
• Track successful authentication events and correlate with any suspicious activity on the sales and inventory system
• Review database audit logs for unauthorized SELECT, INSERT, UPDATE, or DELETE operations

How to Mitigate CVE-2025-7536

Immediate Actions Required

• Restrict network access to the Campcodes Sales and Inventory System to trusted IP ranges only
• Implement web application firewall rules to block SQL injection attempts on the /pages/receipt_credit.php endpoint
• Consider temporarily disabling the receipt credit functionality if not critical to business operations
• Conduct a security review of database user privileges to limit potential impact from SQL injection

Patch Information

At the time of publication, no official patch has been released by Campcodes for this vulnerability. Organizations should monitor the CampCodes official website and the VulDB entry for updates on remediation guidance. Until a patch is available, implementing the workarounds below is strongly recommended.

Workarounds

• Implement input validation on the sid parameter to accept only expected values (e.g., numeric identifiers)
• Use prepared statements or parameterized queries to prevent SQL injection in the affected code
• Deploy a web application firewall with SQL injection detection rules in front of the application
• Restrict database user permissions to minimize the impact of successful exploitation
• Consider placing the application behind a VPN or restricting access to internal networks only

# Example WAF rule to block SQL injection patterns (ModSecurity)
SecRule ARGS:sid "@rx (?i)(\bunion\b|\bselect\b|\binsert\b|\bdelete\b|\bdrop\b|--|;|')" \
    "id:1001,phase:2,deny,status:403,msg:'SQL Injection Attempt Blocked on sid parameter'"