CVE-2026-11966Public exploitNetwork attack vector

Unauthenticated account deletion via Stripe exception handler

Published Jul 17, 2026 · Updated Jul 17, 2026

Authorization bypass in WPEverest User Registration & Membership before 5.2.3 allows remote attackers to delete payment-pending accounts. The public Stripe-subscription AJAX action accepts a caller-supplied member_id, and its exception handler deletes that user after a forced Stripe failure. Exploitation requires an exposed membership page, a configured paid Stripe tier and webhook secret, and a recently registered account with a pending payment.

CVSS severity5.3
Medium
EPSS probability0.30%
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 WPEverest User Registration & Membership before 5.2.3 allows remote attackers to delete payment-pending accounts. The public Stripe-subscription AJAX action accepts a caller-supplied member_id, and its exception handler deletes that user after a forced Stripe failure. Exploitation requires an exposed membership page, a configured paid Stripe tier and webhook secret, and a recently registered account with a pending payment.

The record

CVE
CVE-2026-11966
Published
Jul 17, 2026
Updated
Jul 17, 2026
Vendor
WPEverest
Product
User Registration & Membership
Classifications
CWE-639, T1531
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 17, 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=4.2.3 <5.2.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

WPEverest · User Registration & Membershipversion=4.2.3 <5.2.3

Published CVSS scores

5.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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-639Authorization Bypass Through User-Controlled Key
T1531Account Access Removal

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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