CVE-2020-16861 Microsoft Dynamics 365 (On-Premise) Cross Site Scripting Vulnerability
An authenticated attacker can execute arbitrary scripts in the victim's browser to read unauthorized data and perform actions on their behalf.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2020-16861?
CVE-2020-16861 is a medium-severity cross-site scripting vulnerability in Microsoft Dynamics 365, published on 11 Sep 2020. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
<p>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.</p> <p>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.</p> <p>The security update addresses the vulnerability by helping to ensure that Dynamics Server properly sanitizes web requests.</p>
Weakness: CWE-79
Which versions are affected by CVE-2020-16861?
It affects 1 product.
Products include Microsoft Dynamics 365.
How do I fix CVE-2020-16861?
No fix has been published for CVE-2020-16861 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2020-16861 being exploited?
There is no known exploitation of CVE-2020-16861 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Dynamics 365
- CVE-2026-47647 Dynamics 365 Elevation of Privilege Vulnerability
- CVE-2026-42898 Microsoft Dynamics 365 On-Premises Remote Code Execution Vulnerability
- CVE-2026-32210 Microsoft Dynamics 365 (online) Spoofing Vulnerability
- CVE-2026-42833 Microsoft Dynamics 365 On-Premises Remote Code Execution Vulnerability
- CVE-2024-38182 Microsoft Dynamics 365 Elevation of Privilege Vulnerability
Sources
Also known as GHSA-jcp7-pj7p-cc9r.