ZoloBlocks WordPress Plugin Stored Cross-Site Scripting Vulnerability

A stored cross-site scripting vulnerability has been identified in the ZoloBlocks WordPress plugin, specifically in versions through 2.3.10. This vulnerability arises from inadequate input sanitization and output escaping on user-supplied attributes across various Gutenberg block components. Affected elements include Google Maps markers, Lightbox captions, Image Gallery data attributes, Progress Pie prefix/suffix fields, and Text Path URL fields. As a result, authenticated attackers with contributor-level access or higher can inject arbitrary web scripts into pages, which will execute when users access the compromised 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 into the affected fields of various Gutenberg blocks, such as the Image Gallery or Progress Pie blocks. After saving the changes, the injected scripts will execute when the page is viewed.

Remediation

Users are advised to update the ZoloBlocks WordPress plugin to version 2.3.11 or later.