CVE-2025-4682: 
WordPress vulnerability analysis and mitigation

The Essential Blocks – Page Builder Gutenberg Blocks, Patterns & Templates plugin for WordPress contains a Stored Cross-Site Scripting (XSS) vulnerability (CVE-2025-4682) discovered on May 26, 2025. The vulnerability affects all versions up to and including 5.4.0, allowing authenticated attackers with Contributor-level access or higher to inject malicious scripts via HTML attributes in Slider and Post Carousel widgets (NVD).

The vulnerability stems from insufficient input sanitization and output escaping in the Slider and Post Carousel widgets' HTML attributes, specifically in their frontend.js files. It has been assigned a CVSS v3.1 score of 6.4 (Medium) and is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation). The security flaw affects the plugin's frontend components, particularly in the slider and post-carousel modules (Wiz).

When exploited, this vulnerability enables authenticated attackers with Contributor-level privileges or higher to inject arbitrary web scripts into pages. These malicious scripts execute whenever any user accesses the compromised page, potentially leading to session hijacking, credential theft, or other client-side attacks (NVD, Wiz).

The vulnerability requires an authenticated user with Contributor-level access or higher to exploit. The attack can be executed remotely through the manipulation of HTML attributes in the Slider and Post Carousel widgets (NVD).

The vulnerability has been patched in version 5.4.1 of the Essential Blocks plugin, as evidenced by the update changelog (WordPress Plugin). Users are strongly advised to update to this version or later to protect against this security issue.