Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2026-40507

6.1 · MEDIUM

OpenEMR before 8.3.0 contains a reflected cross-site scripting vulnerability in the patient portal template import handler.

Published Aug 19, 2026CWE-79EPSS 0.34%

Overview

CVE-2026-40507 is a medium-severity vulnerability. It was published on August 19, 2026 and has a CVSS 3.1 base score of 6.1 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.1, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/openemr/openemr/commit/ba316dd1d8de1291102da3f20f64240729ff899eGitHubgithub.com/openemr/openemr/releases/tag/v8_3_0GitHubgithub.com/openemr/openemr/security/advisories/GHSA-rmmr-8498-463gRefwww.vulncheck.com/advisories/openemr-reflected-xss-via-templatehtml-parameter-in-patient-portalGitHubgithub.com/openemr/openemr/security/advisories/GHSA-rmmr-8498-463g

How CyberStrike helps

Frequently asked questions

What is CVE-2026-40507?

CVE-2026-40507 is a medium-severity vulnerability. It was published on August 19, 2026 and has a CVSS 3.1 base score of 6.1 (MEDIUM).

How severe is CVE-2026-40507?

This vulnerability has a CVSS 3.1 base score of 6.1, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-40507?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-40507?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-40507 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

Related MEDIUM CVEs from 2026

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999