What is CVE-2024-21394?

CVE-2024-21394 is a high-severity vulnerability in Microsoft Dynamics 365, classified under Cross-site Scripting. CVSS score: 7.6/10. Published 2024-02-13.

How severe is CVE-2024-21394?

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

Is CVE-2024-21394 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Microsoft Dynamics 365

CVE-2024-21394

Dynamics 365 Field Service Spoofing Vulnerability

Vulnerability class: XSS (Cross-Site Scripting)

Published 2024-02-13 · last modified 2026-08-10.

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: 0.011 (64.8th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 64.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

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

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21394 (vendor-advisory, Patch, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2024-21394?: CVE-2024-21394 is a high-severity vulnerability in Microsoft Dynamics 365, classified under Cross-site Scripting. CVSS score: 7.6/10. Published 2024-02-13.
How severe is CVE-2024-21394?: High severity. CVSS v3 base score is 7.6 out of 10.
Is CVE-2024-21394 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.