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The vulnerability CVE-2026-3753 resides in the SourceCodester Sales and Inventory System, specifically within the file /add_sales_print.php. The issue stems from the application’s failure to properly sanitize user-supplied input passed via the `sid` parameter before using it in a SQL query. This allows an attacker to inject arbitrary SQL code into the database query. By manipulating the `sid` parameter, an authenticated attacker (or one who can bypass low-level authentication) can execute arbitrary SQL statements. This could lead to unauthorized access to sensitive data, modification of database records, or execution of administrative operations on the database. The attack is remotely exploitable, and with the public disclosure of exploit details, the risk of active use is elevated. The CVSS 4.0 vector (CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P) indicates a network-based attack with low complexity, requiring low privileges, and has a medium base severity of 5.3.
dailycve form:
Platform: SourceCodester
Version: up to 1.0
Vulnerability : SQL Injection
Severity: MEDIUM (5.3)
date: 2026-03-08
Prediction: 2026-04-30
What Undercode Say:
Analytics:
- CWE: CWE-89 (Improper Neutralization of Special Elements used in an SQL Command)
- Attack Vector: Network
- Privileges Required: Low
- Exploit Public: Yes
- EPSS Score: Predictions are not available for 2026 CVEs, but public exploits typically increase the EPSS percentile significantly.
Exploit:
Manual SQL injection payload example for the `sid` parameter:
http://target.com/add_sales_print.php?sid=1' UNION SELECT username,password FROM users--
Automated exploitation with SQLmap:
sqlmap -u "http://target.com/add_sales_print.php?sid=1" --cookie="PHPSESSID=your_session_id" -p sid --dbs
Protection from this CVE:
- Parameterized Queries (Prepared Statements): Use PHP PDO or MySQLi prepared statements to ensure that user input is treated as data only.
// Vulnerable code: $sid = $_GET['sid']; $query = "SELECT FROM sales WHERE id = $sid"; $result = mysqli_query($conn, $query); // Secure code using Prepared Statements: $sid = $_GET['sid']; $stmt = $conn->prepare("SELECT FROM sales WHERE id = ?"); $stmt->bind_param("i", $sid); $stmt->execute(); $result = $stmt->get_result(); - Input Validation: Ensure the `sid` parameter strictly matches the expected data type (e.g., integer).
$sid = $_GET['sid']; if (filter_var($sid, FILTER_VALIDATE_INT)) { // Process the integer } else { // Reject the request } - Principle of Least Privilege: Ensure the database user connected to the application has minimal necessary permissions (e.g., not `root` or
DBA).
Impact:
- Confidentiality Breach: Attackers can read sensitive data such as user credentials, sales records, and inventory details.
- Integrity Loss: Attackers can modify or delete database content, corrupting inventory data and financial records.
- Authentication Bypass: Using SQL injection, an attacker might bypass login mechanisms to gain administrative access to the system.
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Sources:
Reported By: nvd.nist.gov
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