CVE-2026-88764 — MEDIUM (5.4)

Vulnerability 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.

CVSS Score

5.4

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

LOW

Integrity

LOW

Availability

NONE

Related Weaknesses (CWE)

CWE-269

References

https://wpscan.com/vulnerability/54fdf46e-0385-40a3-b3bc-a862dc0fb03e/

FAQ

What is CVE-2026-88764?

CVE-2026-88764 is a vulnerability with a CVSS score of 5.4 (MEDIUM). 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, allo...

How severe is CVE-2026-88764?

CVE-2026-88764 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-88764?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.