Description
OpenEMR is a free and open source electronic health records and medical practice management application. Prior to 8.0.0, an unauthenticated token disclosure vulnerability in the MedEx callback endpoint allows any unauthenticated visitor to obtain the practice's MedEx API tokens, leading to complete third-party service compromise, PHI exfiltration, unauthorized actions on the MedEx platform, and HIPAA violations. The vulnerability exists because the endpoint bypasses authentication ($ignoreAuth = true) and performs a MedEx login whenever $_POST['callback_key'] is provided, returning the full JSON response including sensitive API tokens. This vulnerability is fixed in 8.0.0.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| openemr | openemr | < 8.0.0 | — |
Automated scanner template
A ready-made Nuclei template detects this vulnerability automatically. Vulnerabilities with public scanner templates are typically probed across the internet soon after the template appears — exposed systems should be patched first.
- OpenEMR < 8.0.0 - MedEx Callback Unauthenticated Token Disclosure http/cves/2026/CVE-2026-24898.yaml
Source: projectdiscovery/nuclei-templates (MIT) — updated daily. Only links are listed.