What is the CVSS score of CVE-2021-47817?

CVE-2021-47817 has a CVSS 3.1 base score of 5.4 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of Openemr are affected by CVE-2021-47817?

Organizations using OpenEMR 5.0.2.1 should be aware of moderate risk from CVE-2021-47817, a cross-site scripting vulnerability rated CVSS 5.4.

Is there a public PoC exploit available for CVE-2021-47817?

Yes, a public proof-of-concept exploit is available for CVE-2021-47817. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2021-47817?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

Openemr CVE-2021-47817

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2026-01-21 disclosure@vulncheck.com

XSS Openemr

5.4

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.4 MEDIUM

AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Feb 02, 2026 - 17:40 vuln.today

Public exploit code

CVE Published

Jan 21, 2026 - 18:16 nvd

MEDIUM 5.4

DescriptionCVE.org

OpenEMR 5.0.2.1 contains a cross-site scripting vulnerability that allows authenticated attackers to inject malicious JavaScript through user profile parameters. 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.

AnalysisAI

OpenEMR 5.0.2.1 contains a cross-site scripting vulnerability that allows authenticated attackers to inject malicious JavaScript through user profile parameters. [CVSS 5.4 MEDIUM]

Technical ContextAI

Classified as CWE-79 (Cross-site Scripting (XSS)). Affects the user profile component of Openemr. OpenEMR 5.0.2.1 contains a cross-site scripting vulnerability that allows authenticated attackers to inject malicious JavaScript through user profile parameters. 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.

RemediationAI

Monitor vendor advisories for a patch. Implement output encoding and Content Security Policy headers. Restrict network access to the affected service where possible.

CVE-2021-47817 vulnerability details – vuln.today

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