CVE-2024-3961 MEDIUM

CVE-2024-3961: ConvertKit <= 2.4.9 - Missing Authorization

Vendor Convertkit
Product Kit (formerly ConvertKit) – Email Newsletter, Email Marketing, Membership, Subscribers and Landing Pages
Weakness CWE-862 · Missing authorization
Published June 21, 2024
Last update April 8, 2026
View on NVD All CVEs

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity Low

CVSS vector

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

What the vulnerability does

01Description

The ConvertKit – Email Newsletter, Email Marketing, Subscribers and Landing Pages plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the tag_subscriber function in all versions up to, and including, 2.4.9. This makes it possible for unauthenticated attackers to subscribe users to tags. Financial damages may occur to site owners if their API quota is exceeded.

Key dates

02Disclosure timeline

June 21, 2024 CVE published
April 8, 2026 Record updated

Related vulnerabilities

04Related CVE

CVE-2025-49899 WordPress Whydonate plugin <= 4.0.15 - Broken Access Control vulnerability CVE-2022-43476 WordPress Subscribe to Category Plugin <= 2.7.4 is vulnerable to Broken Access Control CVE-2025-69388 WordPress Cliengo – Chatbot plugin <= 3.0.4 - Broken Access Control vulnerability CVE-2025-13679 Tutor LMS <= 3.9.3 - Missing Authorization to Authenticated (Subscriber+) Sensitive Information Exposure via tutor_order_details CVE-2024-7043 Improper Access Control in open-webui/open-webui