What the vulnerability does
01Description
The Bread & Butter plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'breadbutter-customevent-button' shortcode in all versions up to, and including, 8.2.0.25. This is due to insufficient input sanitization and output escaping on the 'event' shortcode attribute. The customEventShortCodeButton() function takes the 'event' attribute value and directly interpolates it into a JavaScript string within an onclick HTML attribute without applying esc_attr() or esc_js(). Notably, the sister function customEventShortCode() properly uses esc_js() for the same attribute, but this was omitted in the button variant. 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 the page and clicks the injected button.
Explanation of Vulnerability in Simple Terms
02Summary
Bread & Butter: AI-Powered Lead Intelligence versions up to 8.2.0.25 contain a cross-site scripting (XSS) vulnerability. An attacker with low-level account access can inject malicious scripts that execute in other users' browsers when they view affected pages. The vulnerability has scope change, meaning it can affect users and functionality beyond the vulnerable component itself.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that run in other users' browsers to steal data or perform actions on their behalf.
Potential impact on your site
04Site Impact
Users' sessions and data are at risk if an attacker with basic account access injects malicious code.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege account on the application; no user interaction required.
Key dates
06Disclosure timeline
April 22, 2026
CVE published
April 22, 2026
Record updated
