CVE-2026-33304Public exploitNetwork attack vector

Authenticated reminder disclosure via user-controlled IDs

Published Mar 19, 2026 · Updated Mar 19, 2026

Authorization bypass in OpenEMR before 8.0.0.2 allows remote authenticated users to read other users' dated reminder messages. The dated reminders log skips its non-admin restriction when sentBy[] or sentTo[] is supplied, then logRemindersArray() uses those IDs to query reminders without authorization. Any authenticated non-admin user with reminder-log access can enumerate sequential user IDs and disclose patient names and free-text message content, but cannot modify reminders through this path.

CVSS severity6.5
Medium
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in OpenEMR before 8.0.0.2 allows remote authenticated users to read other users' dated reminder messages. The dated reminders log skips its non-admin restriction when sentBy[] or sentTo[] is supplied, then logRemindersArray() uses those IDs to query reminders without authorization. Any authenticated non-admin user with reminder-log access can enumerate sequential user IDs and disclose patient names and free-text message content, but cannot modify reminders through this path.

The record

CVE
CVE-2026-33304
Published
Mar 19, 2026
Updated
Mar 19, 2026
Vendor
OpenEMR Foundation
Product
OpenEMR
Classifications
CWE-639, CWE-862, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 19, 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=< 8.0.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OpenEMR Foundation · OpenEMRversion=< 8.0.0.2

Published CVSS scores

6.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

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.

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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 exploitPublished

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
CWE-862Missing Authorization
T1213Data from Information Repositories

Public exploit references

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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