Is this vulnerability remotely exploitable over the internet?

Yes. If the OpenEMR instance exposes the MedEx callback endpoint to the internet or any untrusted network, an attacker can exploit the issue remotely with only network access to that endpoint.

Does an attacker need an account on the OpenEMR system to exploit this?

No. The vulnerable behavior occurs before any authentication or session validation, so no OpenEMR user account or credentials are required.

What is the safest general fix pattern for this type of issue?

The most robust approach is to reintroduce mandatory authentication and authorization checks for the callback endpoint and ensure that sensitive credentials (such as MedEx API tokens) are never returned directly to clients. Instead, tokens should remain server-side and only be used internally when communicating with third-party APIs.

Severity:

CRITICAL RISK

(10.0)

Improper Authentication Bypass (CWE-287) in OpenEMR MedEx Callback Endpoint

CVE-2026-24898

Published:

Mar 3, 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

Recent Vulnerabilities

CWE-78

CRITICAL RISK

CRITICAL

(9.9)

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

Remote Code Execution

March 7, 2026

CWE-89

CRITICAL RISK

CRITICAL

(9.9)

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

Remote Code Execution via SQL Injection on the Database Server

March 7, 2026

Vulnerability Type

Category:

Improper Authentication / Authorization

CWE:

CWE-287

Impact:

Credential Disclosure and Third-Party Service Compromise

Severity:

CRITICAL RISK

(10.0)

CVSS Version:

3.1

Vulnerability Type

Category:

Improper Authentication / Authorization

CWE:

CWE-287

Impact:

Credential Disclosure and Third-Party Service Compromise

Severity:

CRITICAL RISK

(10.0)

CVSS Version:

3.1

Catch This CVE While Code Is Being Written

Detect vulnerable code directly in pull requests, so CVEs are fixed before merge.

Get Started

Ship clean & secure code faster

START 14 DAYS FREE TRIAL

BOOK A DEMO

Made with Love in San Francisco

355 Bryant St. San Francisco, CA 94107, USA

Ask AI for summary of CodeAnt

Made with Love in San Francisco

355 Bryant St. San Francisco, CA 94107, USA

Ask AI for summary of CodeAnt

Made with Love in San Francisco

355 Bryant St. San Francisco, CA 94107, USA

Ask AI for summary of CodeAnt

Improper Authentication Bypass (CWE-287) in OpenEMR MedEx Callback Endpoint

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

Product

Pricing

Company

Legal

Developers

Compare

Product

Pricing

Company

Legal

Developers

Compare

Product

Pricing

Company

Legal

Developers

Compare