CVE-2026-40507OpenEMR < 8.3.0 Reflected XSS via templateHtml Parameter in Patient Portal
Updated under an hour ago ()
Does this affect you?
It affects openemr. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.34%, higher than 26% of scored CVEs.
Do this next
Free account, 1 product
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
- 6.1 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- Weakness (CWE)
- CWE-79
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.34% (percentile 26)
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Oct 1, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
openemr openemr openemr:openemr (from the name) | before 8.3.0 | CNA record |
References
- https://github.com/openemr/openemr/security/advisories/GHSA-rmmr-8498-463gvendor-advisory
- https://github.com/openemr/openemr/releases/tag/v8_3_0release-notes
- https://github.com/openemr/openemr/commit/ba316dd1d8de1291102da3f20f64240729ff899epatch
- https://www.vulncheck.com/advisories/openemr-reflected-xss-via-templatehtml-parameter-in-patient-portalthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.