HIGH 7.1 NVD
CVE-2026-124481
OpenEMR before 8.4.0 contains an improper authorization vulnerability in Rainforest patient portal payments that trusts browser-supplied patientId, encounter, a
OpenEMR before 8.4.0 contains an improper authorization vulnerability in Rainforest patient portal payments that trusts browser-supplied patientId, encounter, and amount values instead of deriving them from the portal session. Authenticated portal patients can tamper with JSON sent to portal_payment.rainforest.php so the payin.authorized webhook writes forged ar_activity credits to other patients' encounters exceeding the amount actually paid.
References
- https://github.com/openemr/openemr/security/advisories/GHSA-525m-fch5-vqqm
- https://www.vulncheck.com/advisories/openemr-before-8.4.0-cross-patient-payment-tampering-
This high severity vulnerability with a CVSS score of 7.1 was published on 2026-11-08 via NVD.
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