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.
Advisories
No advisories yet.
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Sun, 08 Nov 2026 13:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | OpenEMR before 8.4.0 Cross-Patient Payment Tampering via Rainforest Portal Payments | |
| First Time appeared |
Open-emr
Open-emr openemr |
|
| Weaknesses | CWE-639 | |
| CPEs | cpe:2.3:a:open-emr:openemr:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Open-emr
Open-emr openemr |
|
| References |
| |
| Metrics |
cvssV3_1
|
Projects
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Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-11-08T13:16:00.737Z
Reserved: 2026-11-08T02:17:31.141Z
Link: CVE-2026-124481
No data.
Status : Received
Published: 2026-11-08T14:18:17.300
Modified: 2026-11-08T14:18:17.300
Link: CVE-2026-124481
No data.
OpenCVE Enrichment
No data.
Weaknesses