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Vulnerability record · CVE-2023-49289 · published 5 December 2023

CVE-2023-49289: Michaelschwarz ajax.net professional cross-site scripting vulnerability

Michaelschwarz · Ajax.Net Professional

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.

5.4 CVSS 3.1 Medium EPSS 0.63% · top 52.0% CWE-79 · Cross-site scripting
5.4CVSS 3.1 base score
0.63%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/michaelschwarz/Ajax.NET-Professional/commit/c89e39b9679fcb8ab6644fe21cc7e652cb615e2b Patch
https://github.com/michaelschwarz/Ajax.NET-Professional/security/advisories/GHSA-8v6j-gc74-fmpp Vendor Advisory
https://www.nuget.org/packages/AjaxNetProfessional/ Product
https://github.com/michaelschwarz/Ajax.NET-Professional/commit/c89e39b9679fcb8ab6644fe21cc7e652cb615e2b Patch
https://github.com/michaelschwarz/Ajax.NET-Professional/security/advisories/GHSA-8v6j-gc74-fmpp Vendor Advisory
https://www.nuget.org/packages/AjaxNetProfessional/ Product

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Source: NIST National Vulnerability Database (record CVE-2023-49289), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.