CVE-2026-33302: 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…

PriorityP352high8.1CVSS 3.1

AVNACLPRLUINSUCHIHAN

EPSS

0.32%

23.2th percentile

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.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
open-emr	openemr	< 8.0.0.2	8.0.0.2
openemr	openemr	< 8.0.0.2	8.0.0.2

CVSS provenance

nvdv3.18.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

nvdv4.07.3HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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