CVE-2026-33933: Reflected XSS via Unescaped contextName Parameter in Custom Template Editor
OpenEMR is a free and open source electronic health records and medical practice management application. Starting in version 7.0.2.1 and prior to version 8.0.0.3, a reflected cross-site scripting (XSS) vulnerability in the custom template editor allows an attacker to execute arbitrary JavaScript in an authenticated staff member's browser session by sending them a crafted URL. The attacker does not need an OpenEMR account. Version 8.0.0.3 patches the issue.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2026-33933?
CVE-2026-33933 is classified with a moderate severity level due to its ability to allow reflected cross-site scripting (XSS) attacks.
How do I fix CVE-2026-33933?
To fix CVE-2026-33933, upgrade OpenEMR to version 8.0.0.3 or later.
Which versions of OpenEMR are affected by CVE-2026-33933?
CVE-2026-33933 affects OpenEMR versions from 7.0.2.1 to before 8.0.0.3.
What type of vulnerability is CVE-2026-33933?
CVE-2026-33933 is a reflected cross-site scripting (XSS) vulnerability.
What can attackers do with CVE-2026-33933?
Attackers can exploit CVE-2026-33933 to execute arbitrary JavaScript in the context of the user's session.