CVE-2026-88764 Details
Description
The Simple Membership WordPress plugin before 4.7.8 does not validate that the membership level supplied in a PayPal payment notification matches the level configured for the paid payment button, allowing members to pay for a lower-priced membership while being granted a higher, more privileged membership level.
A vulnerability in the Simple Membership WordPress plugin, affecting versions prior to 4.7.8, allows for unauthorized privilege escalation. The plugin fails to verify that the membership level indicated in PayPal payment notifications aligns with the level set for the corresponding payment button. This oversight enables users to purchase a lower-priced membership while receiving access to a higher, more privileged membership level.
Users are advised to update the Simple Membership WordPress plugin to version 4.7.8 or later.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 13, 2026CISA-ADP
Assessed Sep 13, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://wpscan.com/vulnerability/54fdf46e-0385-40a3-b3bc-a862dc0fb03e/ | [email protected] | AdvisoryExploitRemedy |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-269 | Improper Privilege Management | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| Simple Membership | < 4.7.8 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 13, 2026 | CVE Modified | CISA-ADP |
| Sep 13, 2026 | New CVE Received | [email protected] |