Cross-Site Scripting Vulnerability in OpenEMR by OpenEMR
CVE-2021-47817

4.8MEDIUM

Key Information:

Vendor

Openemr Foundation, Inc.

Status
Openemr
Vendor
CVE Published:
21 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2021-47817?

OpenEMR version 5.0.2.1 is susceptible to a cross-site scripting vulnerability that permits authenticated users to inject malicious JavaScript into user profile settings. This flaw can be exploited to craft attacks that might download and execute a web shell, potentially leading to unauthorized remote command execution on the compromised OpenEMR instance. Administrators should promptly update their systems to mitigate this risk.

Affected Version(s)

OpenEMR 5.0.2.1

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2021-47817 - Proof of Concept

References

https://www.exploit-db.com/exploits/49784
exploit
https://www.open-emr.org/
product
https://sourceforge.net/projects/openemr/files/OpenEMR%20...
product

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Hato0, BvThTrd
.