CVE-2026-40507

medium

Description

OpenEMR before 8.3.0 contains a reflected cross-site scripting vulnerability in the patient portal template import handler. The templateHtml GET parameter is reflected into the page response without sanitization. An attacker can craft a URL that executes arbitrary JavaScript in the browser of any authenticated user with Forms Administration permissions who visits the link, enabling session hijacking.

References

https://www.vulncheck.com/advisories/openemr-reflected-xss-via-templatehtml-parameter-in-patient-portal

https://github.com/openemr/openemr/security/advisories/GHSA-rmmr-8498-463g

https://github.com/openemr/openemr/releases/tag/v8_3_0

https://github.com/openemr/openemr/commit/ba316dd1d8de1291102da3f20f64240729ff899e

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-62504

Details

Source: Mitre, NVD

Published: 2026-08-19

Updated: 2026-10-27

Risk Information

CVSS v2

Base Score: 6.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 6.1

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

Severity: Medium

CVSS v4

Base Score: 5.1

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

Severity: Medium

EPSS

EPSS: 0.00338