{"id":"CVE-2026-103021","published":"2026-11-05T20:17:38.033","lastModified":"2026-11-05T20:17:38.033","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.","cvssScore":5.3,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","cwes":["CWE-200","CWE-203","CWE-208"],"vendors":[],"products":[],"references":[{"url":"https://github.com/openemr/openemr/commit/50f789fad45ada625fe8d0faf0c7a9c15ef52aa5","tags":[]},{"url":"https://github.com/openemr/openemr/pull/13133","tags":[]},{"url":"https://github.com/openemr/openemr/releases/tag/v8_3_0","tags":[]},{"url":"https://github.com/openemr/openemr/security/advisories/GHSA-rr38-hpxq-wwff","tags":[]}],"exploitRefs":[{"url":"https://github.com/openemr/openemr/commit/50f789fad45ada625fe8d0faf0c7a9c15ef52aa5","tags":[]},{"url":"https://github.com/openemr/openemr/pull/13133","tags":[]},{"url":"https://github.com/openemr/openemr/releases/tag/v8_3_0","tags":[]},{"url":"https://github.com/openemr/openemr/security/advisories/GHSA-rr38-hpxq-wwff","tags":[]}],"hasPoc":true,"ai":null}