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CVE-2026-14936— Simple Membership < 4.7.7 - Unauthenticated Payment Bypass via Missing PayPal IPN Receiver Verification

Quick assessment

Affected
Unknown Simple Membership
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress Simple Membership是WordPress基金会开源的一个网站会员管理插件。 WordPress Simple Membership 4.7.7之前版本存在安全漏洞，该漏洞源于未验证PayPal支付通知是否发送到站点自身配置的商户账户，可能导致未经身份验证的用户使用其控制的任意PayPal账户付款激活或延长会员资格。

CVSS 5.3 · Medium EPSS 0.16% · P5

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
Unknown Simple Membership < 4.7.7 affected
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I. Basic Information for CVE-2026-14936

Vulnerability Information
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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Simple Membership < 4.7.7 - Unauthenticated Payment Bypass via Missing PayPal IPN Receiver Verification
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress Simple Membership 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress Simple Membership是WordPress基金会开源的一个网站会员管理插件。 WordPress Simple Membership 4.7.7之前版本存在安全漏洞，该漏洞源于未验证PayPal支付通知是否发送到站点自身配置的商户账户，可能导致未经身份验证的用户使用其控制的任意PayPal账户付款激活或延长会员资格。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Unknown Simple Membership 0 ~ 4.7.7 -

II. Public POCs for CVE-2026-14936

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III. Intelligence Information for CVE-2026-14936

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Vendor Advisories for CVE-2026-14936 (1)

Same Patch Batch · Unknown · 2026-08-06 · 49 CVEs total

CVE-2026-14812 10.0 CRITICAL Premium SEO - Unauthenticated Backdoor (Admin Creation / RCE / SSRF / Content Injection)
CVE-2026-11976 10.0 CRITICAL MonsterInsights Pro 10.2.0/10.2.2 - Backdoored via AWS S3 bucket compromise
CVE-2026-17032 9.8 CRITICAL Supsystic Multiple Pro Plugins - Backdoor via Compromised Vendor Update Server
CVE-2026-3430 8.6 HIGH Creative Mail 1.6.5 - 1.6.9 - Unauthenticated SQLi
CVE-2026-16620 7.5 HIGH WPC Name Your Price for WooCommerce < 2.2.5 - Unauthenticated Price Manipulation via Selec
CVE-2026-10524 7.5 HIGH CoCart < 4.9.0 - Unauthenticated Arbitrary Price Manipulation
CVE-2026-13399 7.5 HIGH Payment Plugins for PayPal WooCommerce < 2.0.20 - Unauthenticated Payment Bypass via Reuse
CVE-2026-12584 7.5 HIGH Payment Gateway for Redsys & WooCommerce Lite < 7.0.2 - Unauthenticated Payment Confirmati
CVE-2026-10599 7.5 HIGH Integrate PhonePe with WooCommerce <= 1.2.1 - Unauthenticated Payment Bypass via Transacti
CVE-2026-16619 7.5 HIGH miniOrange 2FA < 6.2.8 - 2FA Bypass via Unlimited Second-Factor Attempts
CVE-2026-5336 6.8 MEDIUM Dataverse Integration < 2.91 - Contributor+ Server-Side Template Injection (SSTI) to Infor
CVE-2026-12901 5.9 MEDIUM GetPaid < 2.8.55 - Unauthenticated Worldpay Payment Bypass via Insufficient IPN Verificati
CVE-2026-11361 5.9 MEDIUM Formidable Forms < 6.32.1 - Unauthenticated Payment Bypass via PayPal APPROVAL_PENDING Sub
CVE-2026-16067 5.3 MEDIUM Event Booking Manager for WooCommerce (Pro) < 5.0.3 - Unauthenticated Payment Bypass via C
CVE-2026-15149 5.3 MEDIUM WP Hotel Booking < 2.3.3 - Unauthenticated Payment Bypass via Price Manipulation
CVE-2026-13342 5.3 MEDIUM Security Optimizer – The All-In-One Protection Plugin < 1.6.5 - Login Access IP Allowlist
CVE-2026-15208 5.3 MEDIUM RegistrationMagic < 6.0.9.5 - Unauthenticated Payment Bypass via Amount-Blind PayPal Verif
CVE-2026-14842 5.3 MEDIUM Events Made Easy < 3.1.2 - Unauthenticated Payment Bypass
CVE-2026-15152 5.3 MEDIUM WP Hotel Booking < 2.3.2 - Unauthenticated PayPal Payment Bypass
CVE-2026-12501 5.3 MEDIUM WP Travel Engine < 6.8.2 - Unauthenticated Payment Bypass via Missing PayPal IPN Receiver

Showing top 20 of 49 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Simple Membership
Same vendor: Unknown

V. Comments for CVE-2026-14936

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