Auth bypass in Open-Emr Openemr
CVE-2026-33304
OpenEMR is a free and open source electronic health records and medical practice management application. Prior to 8.0.0.2, an authorization bypass in the dated reminders log allows any authenticated non-admin user to view reminder messages belonging to other users, including associated patient names and free-text message content, by crafting a GET request with arbitrary user IDs in the `sentTo[]` or `sentBy[]` parameters. Version 8.0.0.2 fixes the issue.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (35.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 35.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
- Open-Emr Openemr
- Openemr — versions < 8.0.0.2
Weakness classification (CWE)
References
- github.com/openemr/openemr/security/advisories/GHSA-66j9-ffq4-h222 (Exploit, Vendor Advisory)
- github.com/openemr/openemr/commit/21dee7658a5f3b18c5750e3fae7324e875c1703a (Patch)
Frequently asked questions
- What is CVE-2026-33304?
- CVE-2026-33304 is a medium-severity vulnerability in Open-Emr Openemr, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-03-19.
- How severe is CVE-2026-33304?
- Medium severity. CVSS v3 base score is 6.5 out of 10.