CVE-2023-49289: Michaelschwarz Ajax.NET Professional

Medium severity, CVSS 5.4. EPSS: 0.6% chance of exploitation in the next 30 days.

Ajax.NET Professional (AjaxPro) is an AJAX framework for Microsoft ASP.NET which will create proxy JavaScript classes that are used on client-side to invoke methods on the web server. Affected versions of this package are vulnerable cross site scripting attacks. Releases before version 21.12.22.1 are affected. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Affected products

• Michaelschwarz Ajax.NET Professional: before 21.12.22.1 (fixed in 21.12.22.1)

Published 2023-12-05. Last modified 2026-06-17.