CVE-2026-126451

HIGH 7.3

OpenEMR before 8.5.0 Stored XSS via Document Template Rendering

CVSS Score

7.3

EPSS Score

0.0%

EPSS Percentile

0th

OpenEMR before 8.5.0 contains a stored cross-site scripting vulnerability that allows portal patients to run JavaScript in staff sessions by injecting javascript: URLs into document template_data. Attackers can submit an encounterForm value rendered unsanitized into an iframe src by DocumentTemplateRender, letting the script read PHI and CSRF tokens and call staff or admin endpoints.

CWE	CWE-79
Vendor	openemr
Product	openemr
Published	Nov 13, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Affected Versions

openemr / openemr

0 < 8.5.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/openemr/openemr/security/advisories/GHSA-hfpq-j3fj-cpmv vulncheck.com: https://www.vulncheck.com/advisories/openemr-before-8.5.0-stored-xss-via-document-template-rendering

Credits

🔍 PhilipPhil 🔍 gracia-gu