What is CVE-2023-36020?

CVE-2023-36020 is a high-severity vulnerability in Microsoft Dynamics 365, classified under Cross-site Scripting. CVSS score: 7.6/10. Published 2023-12-12.

How severe is CVE-2023-36020?

High severity. CVSS v3 base score is 7.6 out of 10.

XSS in Microsoft Dynamics 365

CVE-2023-36020

Microsoft Dynamics 365 (on-premises) Cross-site Scripting Vulnerability

Vulnerability class: XSS (Cross-Site Scripting)

Published 2023-12-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N.

EPSS exploit prediction

EPSS: 0.010 (61.3th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 61.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Microsoft Dynamics 365
Microsoft Dynamics 365 (On-Premises) Version 9.0 — versions 9.0.0
Microsoft Dynamics 365 (On-Premises) Version 9.1 — versions 9.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36020 (vendor-advisory, Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2023-36020?: CVE-2023-36020 is a high-severity vulnerability in Microsoft Dynamics 365, classified under Cross-site Scripting. CVSS score: 7.6/10. Published 2023-12-12.
How severe is CVE-2023-36020?: High severity. CVSS v3 base score is 7.6 out of 10.