Description
OpenEMR is a free and open source electronic health records and medical practice management application. From 6.0.0 until 8.3.0, interface/globals.php uses the unauthenticated authUser login parameter to populate temp_authuserid and load that account's user_settings before authentication succeeds. Existing usernames can therefore cause an additional database query and may apply visible customized settings, while nonexistent usernames skip that behavior. A remote unauthenticated actor can use timing or page differences to enumerate valid accounts for later credential attacks. This issue is fixed in version 8.3.0.
Published: 2026-11-05
Score: 5.3 Medium
EPSS: < 1% Very Low
KEV: No
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Remediation

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Advisories

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History

Tue, 10 Nov 2026 21:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 10 Nov 2026 19:30:00 +0000

Type Values Removed Values Added
First Time appeared Open-emr
Open-emr openemr
CPEs cpe:2.3:a:open-emr:openemr:*:*:*:*:*:*:*:*
Vendors & Products Open-emr
Open-emr openemr

Thu, 05 Nov 2026 22:00:00 +0000

Type Values Removed Values Added
First Time appeared Openemr
Openemr openemr
Vendors & Products Openemr
Openemr openemr

Thu, 05 Nov 2026 20:15:00 +0000

Type Values Removed Values Added
Description OpenEMR is a free and open source electronic health records and medical practice management application. From 6.0.0 until 8.3.0, interface/globals.php uses the unauthenticated authUser login parameter to populate temp_authuserid and load that account's user_settings before authentication succeeds. Existing usernames can therefore cause an additional database query and may apply visible customized settings, while nonexistent usernames skip that behavior. A remote unauthenticated actor can use timing or page differences to enumerate valid accounts for later credential attacks. This issue is fixed in version 8.3.0.
Title OpenEMR: Username Enumeration via Pre-Authentication User Settings Loading
Weaknesses CWE-200
CWE-203
CWE-208
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-11-09T18:18:18.534Z

Reserved: 2026-09-29T21:13:24.031Z

Link: CVE-2026-103021

cve-icon Vulnrichment

Updated: 2026-11-09T18:18:04.131Z

cve-icon NVD

Status : Analyzed

Published: 2026-11-05T20:17:38.033

Modified: 2026-11-10T19:16:44.180

Link: CVE-2026-103021

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-05T21:45:04Z

Weaknesses