CVE-2023-28314Network attack vector

Browser script execution via undisclosed output encoding flaw

Published Apr 11, 2023 · Updated Feb 28, 2025

Cross-site scripting in Microsoft Dynamics 365 (on-premises) 9.0 and 9.1 allows remote attackers to run script in a user browser. Microsoft has not disclosed the affected request parameter or the output-encoding failure that permits injected markup or script to reach a Dynamics page. Exploitation requires a user to open attacker-controlled content; executed script can read or alter data available to that browser session.

CVSS severity6.1
Medium
EPSS probability0.67%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Microsoft Dynamics 365 (on-premises) 9.0 and 9.1 allows remote attackers to run script in a user browser. Microsoft has not disclosed the affected request parameter or the output-encoding failure that permits injected markup or script to reach a Dynamics page. Exploitation requires a user to open attacker-controlled content; executed script can read or alter data available to that browser session.

The record

CVE
CVE-2023-28314
Published
Apr 11, 2023
Updated
Feb 28, 2025
Vendor
Microsoft
Product
Microsoft Dynamics 365 (on-premises) version 9.1
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 11, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 28, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=9.0 <9.1.17.29

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft · Microsoft Dynamics 365 (on-premises) version 9.1version=9.0 <9.1.17.29
Microsoft · Microsoft Dynamics 365 (on-premises) version 9.0version=9.0.0 <9.0.46.15

Published CVSS scores

6.1Microsoft CorporationCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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