CVE-2026-33911: OpenEMR vulnerable to reflected XSS in graphs.php via title parameter
OpenEMR is a free and open source electronic health records and medical practice management application. Prior to version 8.0.0.3, the POST parameter title is reflected back in a JSON response built with jsonencode(). Because the response is served with a text/html Content-Type, the browser interprets injected HTML/script tags rather than treating the output as JSON. An authenticated attacker can craft a request that executes arbitrary JavaScript in a victim's session. Version 8.0.0.3 contains a fix.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2026-33911?
CVE-2026-33911 has a high severity rating due to its potential for reflected cross-site scripting (XSS).
How do I fix CVE-2026-33911?
To fix CVE-2026-33911, upgrade OpenEMR to version 8.0.0.3 or later where the vulnerability has been addressed.
What impact does CVE-2026-33911 have on my application?
CVE-2026-33911 can allow attackers to execute arbitrary JavaScript in the context of a user's browser, potentially leading to data theft or account compromise.
Which software versions are affected by CVE-2026-33911?
CVE-2026-33911 affects OpenEMR versions prior to 8.0.0.3.
Is CVE-2026-33911 a critical vulnerability?
While CVE-2026-33911 is not classified as critical, its nature as an XSS vulnerability poses significant risks if exploited.