EUVD-2026-13221
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Lifecycle Timeline
3Description
OpenEMR is a free and open source electronic health records and medical practice management application. Prior to 8.0.0.2, the module ACL function `AclMain::zhAclCheck()` only checks for the presence of any "allow" (user or group). It never checks for explicit "deny" (allowed=0). As a result, administrators cannot revoke access by setting a user or group to "deny"; if the user is in a group that has "allow," access is granted regardless of explicit denies. Version 8.0.0.2 fixes the issue.
Analysis
A remote code execution vulnerability in OpenEMR (CVSS 8.1). High severity vulnerability requiring prompt remediation.
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Remediation
Within 24 hours: Audit all current user and group ACL configurations to identify any explicit 'deny' rules that may not be enforcing; communicate findings to compliance and privacy teams. Within 7 days: Implement compensating controls by manually restricting group memberships for sensitive roles and conducting access reviews; document all workarounds. …
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External POC / Exploit Code
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