VulnerabilityDeferred
CVE-2026-40507
OpenEMR before 8.3.0 contains a reflected cross-site scripting vulnerability in the patient portal template import handler.
MEDIUM 5.1EPSS 0.30%
Does this matter?
Lower severity and a low EPSS score (0.30%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 4.0
- 5.1 MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
- EPSS
- 0.30% probability · 22th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Source
- disclosure@vulncheck.com
References
- https://github.com/openemr/openemr/commit/ba316dd1d8de1291102da3f20f64240729ff899e
- https://github.com/openemr/openemr/releases/tag/v8_3_0
- https://github.com/openemr/openemr/security/advisories/GHSA-rmmr-8498-463g
- 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.