Kit (formerly ConvertKit) – Email Newsletter, Email Marketing, Membership, Subscribers and Landing Pages <= 3.4.7 - Unauthenticated Sensitive Information Exposure via REST API, Feeds, Archives and WooCommerce Product Descriptions

ID

WPSEC-2026-1941

Plugin

Kit (formerly ConvertKit) – Email Newsletter, Email Marketing, Membership, Subscribers and Landing Pages (convertkit)

Affected

from 2.1.0 before 3.4.8

Remediation

Update to 3.4.8 or later.

CVSS 3.1

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

Weakness

CWE-200

Usage

Plugin Medium · Affected versions Medium among sites WPSec scans, 2026-10-29

Attack surface

Kit (formerly ConvertKit) – Email Newsletter, Email Marketing, Membership, Subscribers and Landing Pages on WPSec AttackSurface

Fix released

2026-10-28

Published

2026-10-29

Description

The Kit (formerly ConvertKit) plugin for WordPress is vulnerable to Sensitive Information Exposure via the Member Content feature in versions 2.1.0 up to, and including, 3.4.7. This is because Member Content restrictions were only applied when a single post, page or product was viewed. This makes it possible for unauthenticated attackers to read the full content of member-only posts, pages and WooCommerce products through other channels. These include the WordPress REST API (content.rendered), RSS and Atom feeds and their generated excerpts, archive, category and search result listings, and, when WooCommerce is active, product descriptions, short descriptions and variation descriptions exposed by the WooCommerce Store API and product blocks.

References

• https://wpsec.com/vuln/WPSEC-2026-1941/
• https://plugins.svn.wordpress.org/convertkit/tags/3.4.8/
• https://wordpress.org/plugins/convertkit/

Published by WPSec. Provided as is, without warranty. Corrections: contact us.

This advisory as JSON or Markdown · All advisories: JSON, RSS