---
id: CVE-2020-1063
title: >-
  A cross site scripting vulnerability exists when Microsoft Dynamics 365
  (on-premises) does not properly sanitize a specially crafted web request to an
  affected Dynamics server
summary: >-
  A cross site scripting vulnerability exists when Microsoft Dynamics 365
  (on-premises) does not properly sanitize a specially crafted web request to an
  affected Dynamics server. An authenticated attacker could exploit the
  vulnerability by…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
vendor: microsoft
product: dynamics_365
affected:
  - dynamics_365 = 8.2
  - dynamics_365 = 9.0
published: '2020-05-21'
updated: '2026-08-19'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2020-1063'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1063'
    label: secure@microsoft.com
  - url: >-
      https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1063
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.01489
epssPercentile: 0.72979
ingestedAt: '2026-08-19T17:42:36.752Z'
---

## Overview

A cross site scripting vulnerability exists when Microsoft Dynamics 365 (on-premises) does not properly sanitize a specially crafted web request to an affected Dynamics server. An authenticated attacker could exploit the vulnerability by sending a specially crafted request to an affected Dynamics server.
The attacker who successfully exploited the vulnerability could then perform cross-site scripting attacks on affected systems and run script in the security context of the current authenticated user. These attacks could allow the attacker to read content that the attacker is not authorized to read, use the victim's identity to take actions within Dynamics Server on behalf of the user, such as change permissions and delete content, and inject malicious content in the browser of the user.
The security update addresses the vulnerability by helping to ensure that Dynamics Server properly sanitizes web requests.

## Affected

- `dynamics_365 = 8.2`
- `dynamics_365 = 9.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.