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    CVE-2026-33911

    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 `json_encode()`. 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.

    Published:Mar 25, 2026
    Last Modified:Mar 27, 2026
    EPS:Mar 25, 2026
    EPSS Score:0.00029
    CVSS Score:5.4

    Affected Products

    Vendor
    Open-emr
    Product
    Openemr
    Vendor
    Openemr
    Product
    Openemr

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2023-54347 (CVSS 8.7) — OpenEMR 7.0.1 contains an authentication brute force vulnerability that allows attackers to bypass rate limiti…
    CVE-2026-34056 (CVSS 7.7) — OpenEMR is a free and open source electronic health records and medical practice management application. A Bro…
    CVE-2026-34055 (CVSS 8.1) — OpenEMR is a free and open source electronic health records and medical practice management application. Prior…
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High