CVE-2024-37277Network attack vector

Unauthenticated order-status manipulation via user-controlled key

Published Nov 1, 2024 · Updated Apr 28, 2026

Authorization bypass in Paid Memberships Pro 3.0.4 and earlier allows remote attackers to mark pending 2Checkout orders as paid. The pmpro_twocheckoutValidate function fails to validate a user-controlled order key before applying the status transition. The public 2Checkout callback requires no account, and exploitation changes order integrity without reported data disclosure or service interruption.

CVSS severity9.8
Critical
EPSS probability0.67%
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 Paid Memberships Pro 3.0.4 and earlier allows remote attackers to mark pending 2Checkout orders as paid. The pmpro_twocheckoutValidate function fails to validate a user-controlled order key before applying the status transition. The public 2Checkout callback requires no account, and exploitation changes order integrity without reported data disclosure or service interruption.

The record

CVE
CVE-2024-37277
Published
Nov 1, 2024
Updated
Apr 28, 2026
Vendor
Paid Memberships Pro
Product
Paid Memberships Pro
Classifications
CWE-639, CAPEC-1, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 1, 2024CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 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 <=3.0.4
  2. Affected versionversion=n/a <=3.0.4 changes=[{"at":"3.0.5","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Paid Memberships Pro · Paid Memberships Proversion=0 <=3.0.4; version=n/a <=3.0.4 changes=[{"at":"3.0.5","status":"unaffected"}]

Published CVSS scores

7.5PatchstackCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
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.

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
CAPEC-1Accessing Functionality Not Properly Constrained by ACLs
T1190Exploit Public-Facing Application

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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