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Openemr EUVDEUVD-2026-13162

| CVE-2026-33301 HIGH
Improper Encoding or Escaping of Output (CWE-116)
2026-03-19 GitHub_M
8.1
CVSS 3.1 · GitHub Advisory
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Authenticate with Notes role
  2. Delivery
    Fill Eye Exam form with malicious HTML
  3. Exploit
    Request PDF generation
  4. Execution
    Parse unescaped HTML in PDF
  5. Impact
    Read arbitrary server files

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Output encoding for downstream
Exploitation Conditions

OpenEMR versions prior to 8.0.0.2. Attacker requires authenticated access with 'Notes - my encounters' role. Attacker must create/modify Eye Exam form answers containing malicious HTML image tags referencing arbitrary server files, then trigger PDF generation to exfiltrate file contents.

Impact

CVSS 8.1. EPSS 0.0%. No patch confirmed.

Exploit ScenarioDerived

An attacker could send a specially crafted request to OpenEMR to execute arbitrary code on the underlying server, potentially gaining full control of the system.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
Patch available 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 19, 2026

A remote code execution vulnerability in OpenEMR (CVSS 8.1). High severity vulnerability requiring prompt remediation.

Earlier versions of this analysis (1)
v1 Mar 19, 2026 - 21:00 CVSS 8.1

OpenEMR is a free and open source electronic health records and medical practice management application. Prior to 8.0.0.2, users with the Notes - my encounters role can fill Eye Exam forms in patie

RemediationAI

Monitor vendor channels for patch availability.

Affected VersionsENISA

OpenEMR < 8.0.0.2

Affected Packages

euvd openemr fix: 8.0.0.2

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Vulnerability type: remote code execution. CVSS 8.1 indicates high severity. Affects OpenEMR.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

GitHub Advisory PRIMARY 8.1 HIGH
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

Lifecycle Timeline

3
Analysis Updated
Apr 16, 2026 - 06:20 EUVD-patch-fix
executive summary
Patch available
Apr 16, 2026 - 05:29 EUVD
8.0.0.2
CVE Published
Mar 19, 2026 - 20:10 nvd
HIGH 8.1

DescriptionGitHub Advisory

OpenEMR is a free and open source electronic health records and medical practice management application. Prior to 8.0.0.2, users with the Notes - my encounters role can fill Eye Exam forms in patient encounters. The answers to the form can be printed out in PDF form. An arbitrary file read vulnerability was identified in the PDF creation function where the form answers are parsed as unescaped HTML, allowing an attacker to include arbitrary image files from the server in the generated PDF. Version 8.0.0.2 fixes the issue.

Executive ViewAI

Why It Matters

OpenEMR contains a remote code execution vulnerability (CVE-2026-33301, CVSS 8.1) that allows unauthenticated attackers to execute arbitrary code on healthcare systems. This directly threatens patient data confidentiality, system integrity, and operational continuity for any organization running vulnerable OpenEMR instances.

Business Impact: High
Compensating Controls

Apply vendor patch.

Threat Intelligence Overview

EPSS Score
0.0%
Top 87% exploitable
Data Quality
6 sources
Confidence: High

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS 0.0%
Patch available Yes
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact
High

Priority Score

40
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +40
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

CVE-2013-10044 HIGH POC
8.7 Aug 01

An authenticated SQL injection vulnerability exists in OpenEMR ≤ 4.1.1 Patch 14 that allows a low-privileged attacker to

CVE-2026-24898 CRITICAL POC
10.0 Mar 03

Unauthenticated token disclosure in OpenEMR before 8.0.0. CVSS 10.0. PoC and patch available.

CVE-2026-24848 CRITICAL POC
9.9 Mar 03

Path traversal in OpenEMR 7.0.4 disposeDocument() allows file access. PoC available.

CVE-2026-24849 CRITICAL POC
9.9 Feb 25

Path traversal in OpenEMR electronic health records before fix allows authenticated users to read arbitrary files on the

CVE-2026-24908 CRITICAL POC
9.9 Feb 25

SQL injection in OpenEMR electronic health records before fix. Authenticated users can execute arbitrary SQL through the

CVE-2024-22611 CRITICAL POC
9.8 Apr 03

OpenEMR 7.0.2 is vulnerable to SQL Injection via \openemr\library\classes\Pharmacy.class.php, \controllers\C_Pharmacy.cl

CVE-2024-37734 CRITICAL POC
9.8 Jun 26

An issue in OpenEMR 7.0.2 allows a remote attacker to escalate privileges viaa crafted POST request using the noteid par

CVE-2026-25146 CRITICAL POC
9.6 Mar 03

Information disclosure in OpenEMR 5.0.2 to before 8.0.0 exposes sensitive data. PoC and patch available.

CVE-2026-39932 CRITICAL POC
9.4 Aug 03

Remote code execution in OpenEMR through 8.2.0 lets an authenticated administrator poison the document category tree so

CVE-2012-0992 HIGH POC
8.5 Feb 07

interface/fax/fax_dispatch.php in OpenEMR 4.1.0 allows remote authenticated users to execute arbitrary commands via shel

CVE-2015-4453 MEDIUM
5.0 Jul 05

interface/globals.php in OpenEMR 2.x, 3.x, and 4.x before 4.2.0 patch 2 allows remote attackers to bypass authentication

CVE-2018-15152 CRITICAL POC
9.1 Aug 15

Authentication bypass vulnerability in portal/account/register.php in versions of OpenEMR before 5.0.1.4 allows a remote

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