CVE-2025-13554: Supplier Management System SQLi Flaw

CVE-2025-13554 Overview

A SQL injection vulnerability has been identified in Campcodes Supplier Management System version 1.0. This security flaw affects the login functionality within the /index.php file, specifically through manipulation of the txtUsername argument. The vulnerability allows remote attackers to inject malicious SQL queries, potentially compromising the application's database and underlying data integrity.

Critical Impact

Remote attackers can exploit this SQL injection flaw to bypass authentication, extract sensitive data, or manipulate database records without requiring any prior authentication.

Affected Products

• Campcodes Supplier Management System 1.0

Discovery Timeline

• 2025-11-23 - CVE-2025-13554 published to NVD
• 2025-12-02 - Last updated in NVD database

Technical Details for CVE-2025-13554

Vulnerability Analysis

This SQL injection vulnerability exists in the authentication mechanism of Campcodes Supplier Management System. The login component fails to properly sanitize user-supplied input in the txtUsername parameter before incorporating it into SQL queries. This allows attackers to craft malicious input that alters the intended query logic.

The vulnerability is classified under CWE-89 (SQL Injection) and CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component). The exploit has been publicly disclosed, increasing the risk of widespread exploitation against unpatched systems.

Root Cause

The root cause of this vulnerability is improper input validation and the lack of parameterized queries in the login function. The application directly concatenates user input from the txtUsername field into SQL statements without proper sanitization or the use of prepared statements. This classic SQL injection pattern allows attackers to inject arbitrary SQL commands that are executed by the database engine.

Attack Vector

The attack can be launched remotely over the network without requiring any prior authentication or user interaction. An attacker can target the login page at /index.php and submit specially crafted SQL payloads through the txtUsername parameter. Successful exploitation could allow attackers to:

• Bypass authentication and gain unauthorized access
• Extract sensitive information from the database
• Modify or delete database records
• Potentially execute system commands depending on database configuration

The vulnerability can be exploited by submitting SQL injection payloads such as ' OR '1'='1' -- or similar techniques through the username field. For detailed technical analysis, refer to the GitHub CVE Issue Discussion and VulDB Critical Threat Intelligence.

Detection Methods for CVE-2025-13554

Indicators of Compromise

• Unusual login attempts containing SQL metacharacters such as single quotes, double dashes, or semicolons in the username field
• Database error messages in application logs indicating malformed SQL syntax
• Unexpected authentication successes from unknown IP addresses
• Database query logs showing anomalous SELECT, UNION, or OR-based injection patterns

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block common SQL injection patterns targeting the /index.php endpoint
• Monitor application logs for failed login attempts with suspicious characters in the username parameter
• Deploy database activity monitoring to identify unusual query patterns or unauthorized data access
• Use intrusion detection systems (IDS) with signatures for SQL injection attacks

Monitoring Recommendations

• Enable verbose logging on the web application server to capture all login attempts and input parameters
• Configure database audit logging to track all queries executed against authentication tables
• Set up alerts for multiple failed login attempts from single IP addresses with varying payload patterns
• Monitor network traffic for outbound connections that may indicate data exfiltration following successful exploitation

How to Mitigate CVE-2025-13554

Immediate Actions Required

• Restrict access to the Supplier Management System login page to trusted IP addresses only
• Implement a Web Application Firewall (WAF) with SQL injection protection rules
• Review application logs for signs of prior exploitation attempts
• Consider temporarily disabling the affected login functionality until a patch is available or workarounds are implemented

Patch Information

At the time of publication, no official patch has been released by the vendor. Organizations should monitor the CampCodes website for security updates and apply patches immediately when available. For additional vulnerability details, consult VulDB #333321.

Workarounds

• Implement input validation to reject SQL metacharacters in the txtUsername field
• Deploy prepared statements or parameterized queries in the application code if source access is available
• Use a reverse proxy or WAF to filter malicious input before it reaches the application
• Limit database user privileges to prevent destructive operations even if injection succeeds
• Enable database connection encryption and restrict database access to application servers only

# Example WAF rule to block SQL injection patterns (ModSecurity)
SecRule ARGS:txtUsername "@rx (\%27)|(\')|(\-\-)|(\%23)|(#)" \
    "id:1001,phase:2,deny,status:403,msg:'SQL Injection attempt blocked'"