CVE-2023-49289: 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 ...

Description

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.

Metrics

CVSS 3.1

5.4/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

EPSS Probability

0.63%

45.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Michaelschwarz	Ajax.Net Professional	< 21.12.22.1

References

Timeline

Published: Dec 5, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-49289?

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.

How severe is CVE-2023-49289?

CVE-2023-49289 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.63% probability of exploitation in the next 30 days.

How do I fix CVE-2023-49289?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.