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CVE-2023-21571

15
FAUCET Score

CVE-2023-21571 is a Cross-site Scripting (XSS) vulnerability affecting Microsoft Dynamics 365 (on-premises). This medium-severity flaw (CVSS 5.4) can be exploited with low attack complexity and requires user interaction, potentially leading to limited impact on confidentiality and integrity. While not actively exploited (KEV: No) and lacking public exploit intelligence (Metasploit, Nuclei, ExploitDB: None), it has garnered minimal community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
> 9.0, < 9.0.45.11CPE matchmatch criteria
cpe:2.3:a:microsoft:dynamics_365:*:*:*:*:on-premises:*:*:*
>= 9.1, < 9.1.16.20CPE matchmatch criteria
cpe:2.3:a:microsoft:dynamics_365:*:*:*:*:on-premises:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.4MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.3
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.61%
Probability of exploitation in next 30 days
EPSS Percentile
45.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0061 is in the 75th percentile among its peer group of 15,239 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: Microsoft Dynamics 365 (on-premises) version 9.1Fixed in: 9.1.16.20
View patch
microsoftpatch availablevia msrc
Product: Microsoft Dynamics 365 (on-premises) version 9.0Fixed in: 9.0.45.11
View patch

Vendor Advisories (1)

microsoft2023-Feb/CVE-2023-21571Important

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

Feb 14, 2023

References

msrc.microsoft.com / update-guide/vulnerability/CVE-2023-21571
PatchVendor Advisory