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The vulnerability CVE-2026-3755 is an SQL injection flaw found in the SourceCodester Sales and Inventory System version 1.0. It specifically exists within the `/check_customer_details.php` file, which is part of the application’s POST Handler component. The issue arises because the application fails to properly sanitize user input supplied to the `stock_name1` argument before using it in a SQL query. An attacker can exploit this by sending a specially crafted POST request to this endpoint, manipulating the `stock_name1` parameter to include malicious SQL code. This allows the attacker to interfere with the application’s database queries, potentially leading to unauthorized access to sensitive data, modification of database contents, or execution of administrative operations on the database. The attack can be carried out remotely without requiring any prior authentication, and a proof-of-concept exploit has been made publicly available, increasing the risk of widespread use .
dailycve form:
Platform: SourceCodester Sales
Version: 1.0
Vulnerability : SQL Injection
Severity: MEDIUM
date: 2026-03-08
Prediction: 2026-04-30
What Undercode Say:
Analytics
The vulnerability is an unauthenticated SQL injection in a PHP application. Given that the exploit is public, the attack surface is wide, affecting any internet-exposed instance of this specific software version. The CVSS 4.0 base score of 5.3 reflects a medium severity with low impact to confidentiality, integrity, and availability .
Exploit:
A basic SQL injection payload can be submitted via the `stock_name1` parameter in a POST request to /check_customer_details.php.
Example using curl to test for SQL injection vulnerability curl -X POST -d "stock_name1=test' OR '1'='1" "http://target-website.com/check_customer_details.php"
A more targeted proof-of-concept (PoC) might use a `UNION SELECT` to extract data.
-- Example payload to extract database version stock_name1=test' UNION ALL SELECT NULL, version(), NULL, NULL--
Protection from this CVE
- Input Validation: Implement strict validation for the `stock_name1` parameter, allowing only expected characters (e.g., alphanumeric and spaces for a stock name).
- Parameterized Queries: Replace dynamic SQL query construction with prepared statements (parameterized queries) to ensure user input is treated as data, not executable code.
- Web Application Firewall (WAF): Deploy a WAF rule to block malicious SQL injection patterns in requests to
/check_customer_details.php. - Principle of Least Privilege: Ensure the database user account used by the web application has minimal necessary privileges to limit the impact of a successful injection.
Impact
Successful exploitation allows a remote, unauthenticated attacker to read, modify, or delete data within the application’s database. This can lead to complete compromise of the inventory and sales data, exposure of customer information, and potentially leverage database access to further compromise the server.
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Sources:
Reported By: nvd.nist.gov
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