OpenEMR up to 8.0.0.2 Patient Portal Payment Page authorization

Summaryinfo

A vulnerability identified as problematic has been detected in OpenEMR. Impacted is an unknown function of the component Patient Portal Payment Page. Performing a manipulation results in authorization. This vulnerability was named CVE-2026-33931. The attack may be initiated remotely. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in OpenEMR. This affects some unknown functionality of the component Patient Portal Payment Page. The manipulation with an unknown input leads to a authorization vulnerability. CWE is classifying the issue as CWE-639. The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. This is going to have an impact on confidentiality. The summary by CVE is:

OpenEMR is a free and open source electronic health records and medical practice management application. Prior to version 8.0.0.3, an Insecure Direct Object Reference (IDOR) vulnerability in the patient portal payment page allows any authenticated portal patient to access other patients' payment records — including invoice/billing data (PHI) and payment card metadata — by manipulating the `recid` query parameter in `portal/portal_payment.php`. Version 8.0.0.3 patches the issue.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-33931 since 03/24/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 8.0.0.3 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 7bf30e0ec5587f80c19094d58df09d46ac328806 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at CNNVD (CNNVD-202603-5526). Statistical analysis made it clear that VulDB provides the best quality 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
• 8.0.0.1
• 8.0.0.2

License

• open-source

Website

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

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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