CVE-2021-47817 OpenEMR 5.0.2.1 - Remote Code Execution
Authenticated attackers can chain XSS with file upload to execute remote code on OpenEMR instances, requiring immediate patching.
- 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-2021-47817?
CVE-2021-47817 is a medium-severity cross-site scripting vulnerability in Open-Emr Openemr, published on 21 Jan 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
OpenEMR 5.0.2.1 contains a cross-site scripting vulnerability in user profile parameters that authenticated attackers can chain with a file upload to achieve remote code execution. Attackers can exploit the vulnerability by crafting a malicious payload to download and execute a web shell, enabling remote command execution on the vulnerable OpenEMR instance.
Weakness: CWE-79
Which versions are affected by CVE-2021-47817?
It affects 1 product.
Products include Open-Emr Openemr.
How do I fix CVE-2021-47817?
No fix has been published for CVE-2021-47817 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-2021-47817 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47817 exists.
Other vulnerabilities in Open-Emr Openemr
- CVE-2026-24898 OpenEMR has an Unauthenticated MedEx Token Disclosure
- CVE-2026-24849 OpenEMR Arbitrary File Read Vulnerability
- CVE-2026-24908 OpenEMR has SQL Injection in Patient API Sort Parameter
- CVE-2022-2734 Improper Restriction of Rendered UI Layers or Frames in openemr/openemr
- CVE-2024-22611 SQL injection in n/a
Sources
Also known as GHSA-pv2r-f997-mjw4.