Vulnerability · Published Aug 6, 2026 · Assigned by WPScan
CVE-2026-14936Simple Membership < 4.7.7 - Unauthenticated Payment Bypass via Missing PayPal IPN Receiver Verification
Medium 5.3
In plain English
A medium-severity insufficient verification of data authenticity in Simple Membership from Unknown. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 6% of all known vulnerabilities).
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.2%top 94.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
The Simple Membership WordPress plugin before 4.7.7 does not verify that a PayPal payment notification was sent to the site's own configured merchant account before activating a membership, allowing unauthenticated users to activate or extend a membership using a payment made to an arbitrary PayPal account they control.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Unknown | Simple Membership | 0 – before 4.7.7 |
Weakness: CWE-345 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
References
- https://wpscan.com/vulnerability/82ac8cd9-db44-49c7-905c-16d261c5c516/ exploit, vdb-entry, technical-description