CVE-2022-2317Public exploitNetwork attack vector

Unauthenticated membership escalation via predictable level identifier

Published Aug 1, 2022 · Updated Aug 3, 2024

Improper privilege management in Simple Membership before 4.1.3 allows remote attackers to gain an arbitrary plugin membership during registration. The registration handler trusts the user-supplied level_identifier, a predictable MD5 value derived from a membership-level number, and assigns the matching level without sufficient validation. No authentication or user interaction is required, but the result changes only Simple Membership access and does not alter the account's WordPress role.

CVSS severity9.8
Critical
EPSS probability1.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper privilege management in Simple Membership before 4.1.3 allows remote attackers to gain an arbitrary plugin membership during registration. The registration handler trusts the user-supplied level_identifier, a predictable MD5 value derived from a membership-level number, and assigns the matching level without sufficient validation. No authentication or user interaction is required, but the result changes only Simple Membership access and does not alter the account's WordPress role.

The record

CVE
CVE-2022-2317
Published
Aug 1, 2022
Updated
Aug 3, 2024
Vendor
WP Affiliate Manager
Product
Simple Membership
Classifications
CWE-269, T1136
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 1, 2022CVE 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?

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

  1. Affected versionversion=4.1.3 <4.1.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

WP Affiliate Manager · Simple Membershipversion=4.1.3 <4.1.3

Published CVSS scores

9.8NIST NVDCVSS: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 exploitPublished

Weakness, pattern, technique

CWE-269Improper Privilege Management
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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