WordPress Infinite Scroll – Ajax Load More Stored Cross-Site Scripting Vulnerability

A stored cross-site scripting vulnerability has been identified in the WordPress Infinite Scroll – Ajax Load More plugin, affecting all versions through 7.4.0.1. The issue arises from inadequate input sanitization and output escaping, allowing authenticated attackers with Contributor-level access or higher to inject arbitrary scripts via the data-button-label HTML attribute. These scripts are executed when a user accesses the affected page.

Impact

Exploitation of this vulnerability allows for stored cross-site scripting, where injected scripts are executed in the context of the user viewing the page.

Reproduction

To reproduce this vulnerability, an authenticated user with Contributor-level access or higher can inject scripts through the data-button-label attribute. Once injected, the scripts will execute when the page is accessed.

Remediation

Users are advised to update the WordPress Infinite Scroll – Ajax Load More plugin to version 7.4.1 or later.