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Vulnerabilities CVE-2026-40508

CVE-2026-40508

Medium
Open
TLP:CLEAR

OpenEMR < 8.3.0 Stored XSS via Patient Portal Template Import Handler

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Description

OpenEMR before 8.3.0 contains a stored cross-site scripting vulnerability in the patient portal template import handler that allows authenticated attackers with Forms Administration permissions to upload template files containing arbitrary HTML or JavaScript. Attackers can inject malicious scripts through the template upload functionality, which are stored without sanitization and execute in the browser of any other Forms Administration user who views the template in the HTML editor.

Details

CVSS Score
5.1
CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Confidence
90%
Published
Aug 19, 2026
Last Modified
Aug 19, 2026
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