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.

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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
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