What the vulnerability does
01Description
The CSS3 Buttons plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'button' shortcode in all versions up to, and including, 0.1 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Explanation of Vulnerability in Simple Terms
02Summary
CSS3 Buttons contains a cross-site scripting (XSS) vulnerability that allows an authenticated attacker to inject malicious scripts affecting other users. The vulnerability exists in versions 0.1 and earlier. An attacker with low-level privileges can inject code that executes in other users' browsers, potentially compromising their sessions or stealing data.
What an attacker can do
03Attacker Capabilities
Inject malicious JavaScript that runs in other users' browsers and affects the site.
Potential impact on your site
04Site Impact
Authenticated users' sessions and data may be compromised; site reputation and user trust at risk.
Conditions required to exploit
05Prerequisites
Attacker must have low-level user account access; no user interaction required.
Key dates
06Disclosure timeline
December 6, 2025
CVE published
April 8, 2026
Record updated