OpenEMR: Username Enumeration via Pre-Authentication User Settings Loading

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-103021
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-05 20:17:38 UTC
Updated2026-11-10 19:16:44 UTC
DescriptionOpenEMR 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.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

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

EPSS: 0.003450000 probability, percentile 0.283450000 (date 2026-11-10)

Problem Types: CWE-200 | CWE-203 | CWE-208 | CWE-200 CWE-200: Exposure of Sensitive Information to an Unauthorized Actor | CWE-203 CWE-203: Observable Discrepancy | CWE-208 CWE-208: Observable Timing Discrepancy

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
3.1CNADECLARED5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Open-emr Openemr All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Openemr Openemr affected >= 6.0.0, < 8.3.0 Not specified

References

ReferenceSourceLinkTags
github.com/openemr/openemr/commit/50f789fad45ada625fe8d0faf0c7a9c15ef52aa5 [email protected] github.com Patch
github.com/openemr/openemr/pull/13133 [email protected] github.com Issue Tracking, Patch
github.com/openemr/openemr/security/advisories/GHSA-rr38-hpxq-wwff 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com Exploit, Mitigation, Vendor Advisory
github.com/openemr/openemr/releases/tag/v8_3_0 [email protected] github.com Product, Release Notes
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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