CVE-2026-1461Network attack vector

Unauthenticated membership manipulation via unsigned Stripe webhooks

Published Feb 19, 2026 · Updated Feb 19, 2026

Improper missing-value handling in Simple Membership 4.7.0 and earlier allows remote attackers to alter memberships through forged Stripe webhooks. The Stripe webhook handler verifies signatures only when stripe-webhook-signing-secret is nonempty, then otherwise trusts attacker-supplied event data. The secret is empty by default, exposing unauthenticated sites to unpaid membership reactivation or legitimate subscription cancellation.

CVSS severity6.5
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper missing-value handling in Simple Membership 4.7.0 and earlier allows remote attackers to alter memberships through forged Stripe webhooks. The Stripe webhook handler verifies signatures only when stripe-webhook-signing-secret is nonempty, then otherwise trusts attacker-supplied event data. The secret is empty by default, exposing unauthenticated sites to unpaid membership reactivation or legitimate subscription cancellation.

The record

CVE
CVE-2026-1461
Published
Feb 19, 2026
Updated
Feb 19, 2026
Vendor
WP Affiliate Manager
Product
Simple Membership
Classifications
CWE-230, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 19, 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=* <=4.7.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

WP Affiliate Manager · Simple Membershipversion=* <=4.7.0

Published CVSS scores

6.5WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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.

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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-230Improper Handling of Missing Values
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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