XSS in Open-Emr Openemr
CVE-2026-46518
OpenEMR is a free and open source electronic health records and medical practice management application. Prior to version 8.0.0.1, a stored cross-site scripting vulnerability in the prescription CSS/HTML multi-print feature allows a patient portal user to execute arbitrary JavaScript in a clinician's browser session. Patient demographic fields (name, address) are rendered without output encoding in multiprintcss_header(), and portal patients can write attacker-controlled HTML directly into patient_data by calling the PUT api/patient/:num endpoint, which bypasses the intended audit review workflow. Because the XSS fires in the clinician's authenticated session on the main OpenEMR interface, the attacker can access CSRF tokens, session data, and perform actions as the clinician — crossing the patient-to-clinician trust boundary. This issue has been patched in version 8.0.0.1.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.008 (54.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 54.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.008 · change: +0.006
Affected products
- Open-Emr Openemr
- Openemr — versions < 8.0.0.1
Weakness classification (CWE)
References
- github.com/openemr/openemr/security/advisories/GHSA-4gh4-q39r-45wf (Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-46518?
- CVE-2026-46518 is a high-severity vulnerability in Open-Emr Openemr, classified under Cross-site Scripting. CVSS score: 7.7/10. Published 2026-06-10.
- How severe is CVE-2026-46518?
- High severity. CVSS v3 base score is 7.7 out of 10.