CVE-2021-32101Public exploitNetwork attack vector

Unauthenticated patient data access via registration session

Published May 7, 2021 · Updated Aug 3, 2024

Access-control bypass in the Patient Portal of OpenEMR 5.0.2.1 allows remote attackers to read and alter every patient's data. The registration endpoint leaves pid and register session flags set without completing registration, causing _machine_config.php to set ignoreAuth and expose the portal API. The Patient Portal must be active and reachable, but the bypass works even when new-user registration is disabled.

CVSS severity8.2
High
EPSS probability1.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Access-control bypass in the Patient Portal of OpenEMR 5.0.2.1 allows remote attackers to read and alter every patient's data. The registration endpoint leaves pid and register session flags set without completing registration, causing _machine_config.php to set ignoreAuth and expose the portal API. The Patient Portal must be active and reachable, but the bypass works even when new-user registration is disabled.

The record

CVE
CVE-2021-32101
Published
May 7, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-732, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 7, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.4NIST National Vulnerability DatabaseAV:N/AC:L/Au:N/C:P/I:P/A:N
8.2NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/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.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-732Incorrect Permission Assignment for Critical Resource
T1190Exploit Public-Facing Application

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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