Is this vulnerability remotely exploitable?

Yes. Any attacker with network access to the OpenEMR patient portal and a valid portal account can exploit it by tampering with patient identifiers in their requests.

Does exploitation require special or elevated access?

No elevated access is required beyond a normal patient portal login. The attack is a horizontal privilege escalation where a standard user abuses missing ownership checks to access another patient's data.

What is the safest general fix pattern for this issue?

The most robust fix is to ignore client-supplied patient identifiers for portal users and always derive the active patient ID from the authenticated session, enforcing that every portal operation uses this session-bound identifier and passes through consistent authorization checks.

Severity:

HIGH RISK

(7.1)

Horizontal Privilege Escalation via Insecure Direct Object Reference (CWE-639) in OpenEMR Patient Portal Payments

CVE-2026-25147

Published:

Feb 27, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

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CRITICAL

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Remote Code Execution via SQL Injection on the Database Server

March 7, 2026

Vulnerability Type

Category:

Horizontal Privilege Escalation / Insecure Direct Object Reference

CWE:

CWE-639

Impact:

Unauthorized Access to Other Patients' Billing and Demographic Data

Severity:

HIGH RISK

(7.1)

CVSS Version:

3.1

Vulnerability Type

Category:

Horizontal Privilege Escalation / Insecure Direct Object Reference

CWE:

CWE-639

Impact:

Unauthorized Access to Other Patients' Billing and Demographic Data

Severity:

HIGH RISK

(7.1)

CVSS Version:

3.1

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Ask AI for summary of CodeAnt

Horizontal Privilege Escalation via Insecure Direct Object Reference (CWE-639) in OpenEMR Patient Portal Payments

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

CRITICAL RISK

CRITICAL

(9.9)

Command Injection in MCP Stdio Configuration Validation (CWE-78) in WeKnora

CRITICAL RISK

CRITICAL

(9.9)

SQL Injection via PostgreSQL Array/Row Expressions (CWE-89) in WeKnora Query Engine

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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