CVE-2021-37394Public exploitNetwork attack vector

Administrator account creation via unchecked role assignment

Published Jul 26, 2021 · Updated Aug 4, 2024

Improper authorization in RPCMS 1.8 and earlier allows remote authenticated users to create administrator accounts through its API. Within system/api/Member.class.php, register() copies the client-supplied role parameter into the user record and accepts admin without an authorization check. The API must be enabled and a low-privileged account must reach registration; successful use creates a new administrator account with elevated control.

CVSS severity8.8
High
EPSS probability1.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authorization in RPCMS 1.8 and earlier allows remote authenticated users to create administrator accounts through its API. Within system/api/Member.class.php, register() copies the client-supplied role parameter into the user record and accepts admin without an authorization check. The API must be enabled and a low-privileged account must reach registration; successful use creates a new administrator account with elevated control.

The record

CVE
CVE-2021-37394
Published
Jul 26, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1136
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 26, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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 privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.0NIST NVDAV:N/AC:M/Au:S/C:P/I:P/A:P

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

T1136Create Account

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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