CVE-2020-1063Network attack vector

Authenticated script execution via unsanitized web request

Published May 21, 2020 · Updated Aug 19, 2026

Cross-site scripting in Microsoft Dynamics 365 on-premises 8.2 and 9.0 allows remote authenticated users to execute script via crafted web requests. The Dynamics server fails to sanitize specially crafted web requests, so attacker-controlled script runs in the security context of the current authenticated user. The attacker must be authenticated and induce browser processing; successful exploitation can read unauthorized content, change permissions, delete content, or inject browser content.

CVSS severity5.4
Medium
EPSS probability1.49%
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 8.2 and 9.0 allows remote authenticated users to execute script via crafted web requests. The Dynamics server fails to sanitize specially crafted web requests, so attacker-controlled script runs in the security context of the current authenticated user. The attacker must be authenticated and induce browser processing; successful exploitation can read unauthorized content, change permissions, delete content, or inject browser content.

The record

CVE
CVE-2020-1063
Published
May 21, 2020
Updated
Aug 19, 2026
Vendor
Microsoft
Product
Dynamics 365
Classifications
CWE-79, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 21, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 2026Record 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=8.0 <publication

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Microsoft · Dynamics 365version=8.0 <publication
Microsoft · Microsoft Dynamics 365 (on-premises) version 9.0version=9.0.0 <publication

Published CVSS scores

5.4NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
3.5NVDAV:N/AC:M/Au:S/C:N/I:P/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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