CVE-2026-33918Network attack vector

Authenticated PHI disclosure and deletion via missing ACL

Published Mar 25, 2026 · Updated Mar 25, 2026

Missing authorization in OpenEMR before 8.0.0.3 allows remote authenticated users to read and delete electronic claim batch files. The interface/billing/get_claim_file.php endpoint validates only the session and CSRF token, then streams the file selected by a predictable key and optionally passes it to unlink() without checking either billing ACL. Any account can therefore disclose PHI and permanently remove claim files, but access requires a valid session and CSRF token and is limited to intended claim-file directories.

CVSS severity7.6
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in OpenEMR before 8.0.0.3 allows remote authenticated users to read and delete electronic claim batch files. The interface/billing/get_claim_file.php endpoint validates only the session and CSRF token, then streams the file selected by a predictable key and optionally passes it to unlink() without checking either billing ACL. Any account can therefore disclose PHI and permanently remove claim files, but access requires a valid session and CSRF token and is limited to intended claim-file directories.

The record

CVE
CVE-2026-33918
Published
Mar 25, 2026
Updated
Mar 25, 2026
Vendor
OpenEMR Foundation
Product
OpenEMR
Classifications
CWE-862, T1213, T1485
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 8.0.0.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OpenEMR Foundation · OpenEMRversion=< 8.0.0.3

Published CVSS scores

7.6GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1213Data from Information Repositories
T1485Data Destruction

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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