Simple Membership <= 4.7.0 — Unauthenticated Improper Handling of Missing Values
CVE-2026-1461Published · Updated Action summary
Affected: ≤4.7.0Update to 4.7.1 or newer
All remediation steps- Severity
- Medium6.5
- CVSS
- 6.5CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:NWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:NPrivileges required- None
UI:NUser interaction- None
S:UScope- Unchanged
C:LConfidentiality- Low
I:LIntegrity- Low
A:NAvailability- None
- Required access
- No account needed
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
Simple Membership simple-membership
- Affected≤ 4.7.0
- Patched in4.7.1
Update to 4.7.1 or newer.
You are affected if you run ≤ 4.7.0. Version 4.7.1 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Simple Membership.
- No admin access? Run a passive check of your site. It reads public files only.
- No account is needed to exploit this. Treat any exposed site on an affected version as at risk.
What to do
- Update to version 4.7.1, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch Simple Membership to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to 0N0ise.
The Simple Membership plugin for WordPress is vulnerable to Improper Handling of Missing Values in all versions up to, and including, 4.7.0 via the Stripe webhook handler. This is due to the plugin only validating webhook signatures when the stripe-webhook-signing-secret setting is configured, which is empty by default. This makes it possible for unauthenticated attackers to forge Stripe webhook events to manipulate membership subscriptions, including reactivating expired memberships without payment or canceling legitimate subscriptions, potentially leading to unauthorized access and service disruption.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in Simple Membership
All 39| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium6.4 | Authenticated (Subscriber+) Stored Cross-Site Scripting via Country Field ≤4.8.4Update to 4.8.5 | CVE-2026-103427 | |
| Low3.1 | Information Exposure ≤4.8.2Update to 4.8.3 | CVE-2026-88785 | |
| High7.5 | Missing Authorization to Unauthenticated Account Takeover and Sensitive Information Disclosure via 'email' Parameter on Activation Endpoints ≤4.8.3Update to 4.8.4 | CVE-2026-97337 | |
| Medium4.3 | Missing Authorization ≤4.8.2Update to 4.8.3 | CVE-2026-74000 | |
| Medium4.3 | Missing Authorization <4.7.8Update to 4.7.8 | CVE-2026-88764 |
- Medium6.4Authenticated (Subscriber+) Stored Cross-Site Scripting via Country Field
≤4.8.4Update to 4.8.5
- Low3.1Information Exposure
≤4.8.2Update to 4.8.3
- High7.5Missing Authorization to Unauthenticated Account Takeover and Sensitive Information Disclosure via 'email' Parameter on Activation Endpoints
≤4.8.3Update to 4.8.4
- Medium4.3Missing Authorization
≤4.8.2Update to 4.8.3
- Medium4.3Missing Authorization
<4.7.8Update to 4.7.8
Timeline
CVE published
Severity medium, CVSS 6.5
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.