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Advisories

OpenEMR before 8.4.0 OAuth Authorization Bypass via Scope Canonicalization

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Severity
critical
Date
Affecting

  • openemr >= 0, < 8.4.0

CWE
  • CWE-863 Incorrect Authorization
CVSS
9.3
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Credit
mcspicyenjoyer
Description
OpenEMR before 8.4.0 contains OAuth scope canonicalization and containment flaws that allow unauthenticated attackers to obtain unapproved system-level FHIR access. Attackers can register a colon-form system:Patient.read client that bypasses approval, then request unregistered system/Patient.write scope to read, modify, and create Patient records.

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