What the vulnerability does
01Description
The Clearfy Cache – WordPress optimization plugin, Minify HTML, CSS & JS, Defer plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 2.4.0. This is due to missing nonce validation on the "wbcr_upm_change_flag" function. This makes it possible for unauthenticated attackers to disable plugin/theme update notifications via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.
Explanation of Vulnerability in Simple Terms
02Summary
Clearfy Cache versions up to 2.4.0 contain a cross-site request forgery (CSRF) vulnerability that allows attackers to perform unauthorized actions on behalf of site administrators. An attacker can craft a malicious link or page that, when visited by an admin, triggers unwanted changes to plugin settings or site configuration. The vulnerability requires user interaction—the admin must click the link or visit the attacker's page while logged in.
What an attacker can do
03Attacker Capabilities
Trick a logged-in admin into performing unauthorized actions on the site via a malicious link or page.
Potential impact on your site
04Site Impact
An attacker could modify Clearfy Cache settings or trigger unintended site changes if an admin is tricked into clicking a malicious link.
Conditions required to exploit
05Prerequisites
Admin must click a malicious link or visit an attacker-controlled page while logged into WordPress.
Key dates
06Disclosure timeline
January 9, 2026
CVE published
April 8, 2026
Record updated
