CVE-2022-4939Network attack vector

Unauthenticated administrator registration via unchecked AJAX settings

Published Apr 5, 2023 · Updated Apr 8, 2026

Missing authorization in WC Lovers WCFM Membership 2.10.0 and earlier allows remote attackers to register WordPress administrator accounts. The public wcfm_ajax_controller AJAX action accepts membership-setting changes without a capability check, allowing the registration role to be set to administrator. Unauthenticated network access is sufficient; the resulting account obtains full WordPress administrative control.

CVSS severity9.8
Critical
EPSS probability2.10%
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 WC Lovers WCFM Membership 2.10.0 and earlier allows remote attackers to register WordPress administrator accounts. The public wcfm_ajax_controller AJAX action accepts membership-setting changes without a capability check, allowing the registration role to be set to administrator. Unauthenticated network access is sufficient; the resulting account obtains full WordPress administrative control.

The record

CVE
CVE-2022-4939
Published
Apr 5, 2023
Updated
Apr 8, 2026
Vendor
WC Lovers
Product
WCFM Membership
Classifications
CWE-862, T1190, T1136
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 5, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 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=0 <=2.10.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

WC Lovers · WCFM Membershipversion=0 <=2.10.0

Published CVSS scores

9.8WordfenceCVSS:3.1/AV:N/AC:L/PR:N/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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1190Exploit Public-Facing Application
T1136Create Account

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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