OpenEMR up to 8.0.0 PUT API multiprintcss_header cross site scripting

Summaryinfo

A vulnerability categorized as problematic has been discovered in OpenEMR. Affected by this vulnerability is the function multiprintcss_header of the component PUT API. Executing a manipulation can lead to cross site scripting. The identification of this vulnerability is CVE-2026-46518. The attack may be launched remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in OpenEMR and classified as problematic. This vulnerability affects the function multiprintcss_header of the component PUT API. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. CVE summarizes:

OpenEMR is a free and open source electronic health records and medical practice management application. Prior to version 8.0.0.1, a stored cross-site scripting vulnerability in the prescription CSS/HTML multi-print feature allows a patient portal user to execute arbitrary JavaScript in a clinician's browser session. Patient demographic fields (name, address) are rendered without output encoding in multiprintcss_header(), and portal patients can write attacker-controlled HTML directly into patient_data by calling the PUT api/patient/:num endpoint, which bypasses the intended audit review workflow. Because the XSS fires in the clinician's authenticated session on the main OpenEMR interface, the attacker can access CSRF tokens, session data, and perform actions as the clinician — crossing the patient-to-clinician trust boundary. This issue has been patched in version 8.0.0.1.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-46518 since 05/14/2026. The exploitation appears to be difficult. The attack can be initiated remotely. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1059.007.

Upgrading to version 8.0.0.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-35869). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Business Process Management Software

Name

• OpenEMR

Version

• 2.8.1
• 2.8.2
• 3.1.0
• 3.2
• 3.2.0
• 4.0.0
• 4.1.0
• 4.1.1
• 5.0.0
• 5.0.0 Patch 1
• 5.0.1
• 5.0.1-6
• 5.0.1-dev
• 5.0.1.1
• 5.0.1.3
• 5.0.1.4
• 5.0.2
• 5.0.2.1
• 5.0.2.4
• 5.0.2.5
• 6.0.0
• 6.0.0-dev
• 6.0.0.0
• 6.0.0.2
• 6.0.0.4
• 6.1.0
• 6.1.0.1
• 7.0.0
• 7.0.0.1
• 7.0.0.2
• 7.0.1
• 7.0.2
• 7.0.2.1
• 7.0.3
• 7.0.3.1
• 7.0.3.4
• 7.0.4
• 7.3.0
• 8.0.0

License

• open-source

Website

• Product: https://github.com/openemr/openemr/

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Once again VulDB remains the best source for vulnerability data.

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