CVE-2026-40507 (GCVE-0-2026-40507)

Vulnerability from cvelistv5 – Published: 2026-08-19 14:48 – Updated: 2026-10-01 15:19 X_Open Source
VLAI
Title
OpenEMR < 8.3.0 Reflected XSS via templateHtml Parameter in Patient Portal
Summary
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.
Severity
5.1 (Medium)
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
6.1 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 02:06 UTC
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
VulnCheck CNA under the mitre root
CNA scorecard B 84/100 over 7415 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
openemr openemr Affected: 0 , < 8.3.0 (semver)
    cpe:2.3:a:open-emr:openemr:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-08-18 00:00
Credits
Alex Williams from Pellera Technologies VulnCheck
Show details on NVD website
To clipboard 

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