Vulnerability · Published Nov 7, 2026 · Assigned by Wordfence

CVE-2026-96565WP-Members Membership Plugin <= 3.5.7 - Authenticated (Subscriber+) Stored Cross-Site Scripting via WooCommerce Checkout Multicheckbox/Multiselect Field

Medium 6.4

In plain English

A medium-severity cross-site scripting in WP-Members Membership Plugin from cbutlerjr. There are no confirmed reports of exploitation so far.

Severity (CVSS 3.1)6.4Medium

Exploit odds (30 days)–no EPSS score yet

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

The WP-Members Membership Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via WooCommerce Checkout Multicheckbox/Multiselect Field (scalar bypass of wpmem_sanitize_array) in all versions up to, and including, 3.5.7 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This is only exploitable via the WooCommerce classic checkout path, as the sibling registration, profile, and account-edit handlers implode the value before sanitization, which raises a PHP 8 TypeError on scalar input and fails closed.

Affected products (as reported)

Vendor	Product	Versions
cbutlerjr	WP-Members Membership Plugin	0 – through 3.5.7

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

In plain English

Official description

Affected products (as reported)

References