CVE-2026-66712 HIGH

CVE-2026-66712: WordPress Simple Membership plugin <= 4.7.8 - Broken Access Control vulnerability

Vendor Wp.insider

Product Simple Membership

Weakness CWE-862 · Missing authorization

Published August 6, 2026

Last update August 6, 2026

View on NVD All CVEs

CVSS base score

7.5/10

Attack vector Network

Attack complexity Low

Privileges required None

User interaction None

Confidentiality None

Integrity High

CVSS vector

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

What the vulnerability does

01Description

Unauthenticated Broken Access Control in Simple Membership <= 4.7.8 versions.

Explanation of Vulnerability in Simple Terms

02Summary

Simple Membership versions up to 4.7.8 lack proper authorization checks, allowing unauthenticated attackers to modify data on the site. The vulnerability requires no user interaction and can be exploited over the network. Site administrators should update to a version newer than 4.7.8 immediately.

What an attacker can do

03Attacker Capabilities

Modify or corrupt site data without logging in.

Potential impact on your site

04Site Impact

Unauthorized users can alter membership records, settings, or other protected data.

Conditions required to exploit

05Prerequisites

Network access only; no authentication or user interaction required.

Key dates

06Disclosure timeline

August 6, 2026 CVE published

August 6, 2026 Record updated

External resources

07References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2026-66712 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/862.html AskarLabs — CWE-862 write-up Missing Authorization

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