How severe is CVE-2023-49289?

CVE-2023-49289 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2023-49289 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-49289?

CVE-2023-49289 affects Michaelschwarz Ajax.net Professional. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-49289?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-49289 published?

CVE-2023-49289 was published on 2023-12-05 and last updated on 2026-06-17.

CVE-2023-49289

CVE-2023-49289 is a medium-severity vulnerability in Michaelschwarz Ajax.net Professional with a CVSS 3.x base score of 6.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.3)
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Michaelschwarz Ajax.net Professional
Published: 2023-12-05
Last modified: 2026-06-17

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.

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 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2023-49289 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-49289?: CVE-2023-49289 affects Michaelschwarz Ajax.net Professional. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-49289?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-49289 published?: CVE-2023-49289 was published on 2023-12-05 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:michaelschwarz:ajax.net_professional:*:*:*:*:*:asp.net:*:*

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