CVE-2021-4421 MEDIUM

CVE-2021-4421: Advanced Popups <= 1.1.1 - Cross-Site Request Forgery Bypass

Vendor Codesupplyco
Product Advanced Popups
Weakness CWE-352 · CSRF
Published July 12, 2023
Last update April 8, 2026

CVSS base score

4.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality None
Integrity Low

CVSS vector

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

What the vulnerability does

01Description

The Advanced Popups plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 1.1.1. This is due to missing or incorrect nonce validation on the metabox_popup_save() function. This makes it possible for unauthenticated attackers to save meta tags via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

Key dates

02Disclosure timeline

July 12, 2023 CVE published
April 8, 2026 Record updated