Vulnerability 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 Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/openemr/openemr/commit/ba316dd1d8de1291102da3f20f64240729ff89
- 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-para
- https://github.com/openemr/openemr/security/advisories/GHSA-rmmr-8498-463g
FAQ
What is CVE-2026-40507?
CVE-2026-40507 is a vulnerability with a CVSS score of 6.1 (MEDIUM). 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 s...
How severe is CVE-2026-40507?
CVE-2026-40507 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-40507?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.