CVE-2026-103021

MEDIUM 5.3

OpenEMR: Username Enumeration via Pre-Authentication User Settings Loading

CVSS Score

5.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-200 CWE-203 CWE-208
Vendor	openemr
Product	openemr
Published	Nov 5, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Affected Versions

openemr / openemr

>= 6.0.0, < 8.3.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/openemr/openemr/security/advisories/GHSA-rr38-hpxq-wwff github.com: https://github.com/openemr/openemr/pull/13133 github.com: https://github.com/openemr/openemr/commit/50f789fad45ada625fe8d0faf0c7a9c15ef52aa5 github.com: https://github.com/openemr/openemr/releases/tag/v8_3_0