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TI-2023-26925 Aliases CVE-2023-49289GHSA-8v6j-gc74-fmpp

Cross-site Scripting in Ajax.NET Professional

Priority LOW 29CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · Low
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00628 50th percentileScored 2026-11-07
Fix Fixed Ajax.NET-Professional (michaelschwarz): 21.12.22.1AjaxNetProfessional (NuGet): 21.12.22.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
michaelschwarzAjax.NET-Professionalbefore 21.12.22.121.12.22.1Patch availableCNA
—AjaxNetProfessional (NuGet)before 21.12.22.121.12.22.1Patch availableGHSA-8v6j-gc74-fmpp
  • Ajax.NET-Professional Vendormichaelschwarz Affected before 21.12.22.1 Fixed in 21.12.22.1 Patch available CNA
  • AjaxNetProfessional (NuGet) Vendor— Affected before 21.12.22.1 Fixed in 21.12.22.1 Patch available GHSA-8v6j-gc74-fmpp

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:michaelschwarz:ajax.net_professional:*:*:*:*:*:asp.net:*:*before 21.12.22.1Vulnerablemichaelschwarz
  • cpe:2.3:a:michaelschwarz:ajax.net_professional:*:*:*:*:*:asp.net:*:* Versions before 21.12.22.1 Vulnerable ·michaelschwarz

Remediation

  • Fix · CNA Ajax.NET-Professional (michaelschwarz) Fixed in 21.12.22.1
  • Fix · GHSA-8v6j-gc74-fmpp AjaxNetProfessional (NuGet) Fixed in 21.12.22.1 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-49289
  2. 2026-10-03 Alias added: GHSA-8v6j-gc74-fmpp
  3. 2026-10-30 EPSS moved to the 50th–90th percentile

References

Patch 1

Advisory 2

Other 3

  • TI-2021-06186 Deserialization of untrusted data in AjaxPro.2 KEVCVSS 3.1CRITICAL 9.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences