CVE-2026-14936: CWE-345 Insufficient Verification of Data Authenticity in Simple Membership
A vulnerability in the Simple Membership WordPress plugin before version 4.7.7 allows unauthenticated users to activate or extend memberships by exploiting insufficient verification of PayPal payment notifications. The plugin does not confirm that the payment notification was sent to the site's configured merchant account, enabling attackers to use payments made to arbitrary PayPal accounts they control.
AI Analysis
Technical Summary
CVE-2026-14936 describes a security flaw in the Simple Membership WordPress plugin where the plugin fails to verify that PayPal payment notifications correspond to the site's own merchant account before activating or extending memberships. This insufficient verification (CWE-345) allows unauthenticated attackers to bypass payment validation by submitting payment notifications from arbitrary PayPal accounts, potentially granting unauthorized membership access or extensions.
Potential Impact
The vulnerability allows attackers to activate or extend memberships without making legitimate payments to the site's merchant account. This can lead to unauthorized access to membership-restricted content or services, resulting in potential revenue loss and abuse of membership privileges. There is no direct confidentiality or availability impact reported.
Mitigation Recommendations
No official patch or remediation is currently confirmed for this vulnerability. Users of the Simple Membership plugin should monitor the vendor's advisories for updates and apply any official fixes once available. Until then, consider implementing additional manual verification of PayPal payment notifications or temporarily disabling membership activation features that rely on PayPal payments.
CVE-2026-14936: CWE-345 Insufficient Verification of Data Authenticity in Simple Membership
Description
A vulnerability in the Simple Membership WordPress plugin before version 4.7.7 allows unauthenticated users to activate or extend memberships by exploiting insufficient verification of PayPal payment notifications. The plugin does not confirm that the payment notification was sent to the site's configured merchant account, enabling attackers to use payments made to arbitrary PayPal accounts they control.
CVSS v3.1
Score 5.3medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-14936 describes a security flaw in the Simple Membership WordPress plugin where the plugin fails to verify that PayPal payment notifications correspond to the site's own merchant account before activating or extending memberships. This insufficient verification (CWE-345) allows unauthenticated attackers to bypass payment validation by submitting payment notifications from arbitrary PayPal accounts, potentially granting unauthorized membership access or extensions.
Potential Impact
The vulnerability allows attackers to activate or extend memberships without making legitimate payments to the site's merchant account. This can lead to unauthorized access to membership-restricted content or services, resulting in potential revenue loss and abuse of membership privileges. There is no direct confidentiality or availability impact reported.
Mitigation Recommendations
No official patch or remediation is currently confirmed for this vulnerability. Users of the Simple Membership plugin should monitor the vendor's advisories for updates and apply any official fixes once available. Until then, consider implementing additional manual verification of PayPal payment notifications or temporarily disabling membership activation features that rely on PayPal payments.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WPScan
- Date Reserved
- 2026-07-07T11:50:26.844Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a7506f5bf8831d5395f5453
Added to database: 08/06/2026, 22:13:09 UTC
Last enriched: 08/06/2026, 23:58:39 UTC
Last updated: 08/07/2026, 02:01:05 UTC
Views: 3
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