Newpost Catch WordPress Plugin Stored Cross-Site Scripting Vulnerability

A stored cross-site scripting vulnerability has been identified in the Newpost Catch plugin for WordPress, affecting all versions through 1.3.19. The issue arises from inadequate input sanitization and output escaping of user-supplied attributes in the plugin's npc shortcode. This vulnerability allows authenticated attackers with contributor-level access or higher to inject arbitrary web scripts into pages, which are executed when users access the injected pages.

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.

Remediation

Users can update to version 1.3.20 or a newer patched version to address this vulnerability.