LJUsers WordPress Plugin Stored Cross-Site Scripting Vulnerability

A stored cross-site scripting vulnerability has been identified in the LJUsers plugin for WordPress, affecting all versions through 1.2.0. The issue arises from inadequate input sanitization and output escaping of user-supplied attributes in the 'name' parameter of the 'ljuser' shortcode. This vulnerability allows authenticated attackers with Contributor-level access and above to inject arbitrary web scripts into pages, which are executed when users access the affected 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.

Reproduction

To reproduce this vulnerability, an authenticated user with Contributor-level access or higher can inject a script into the 'name' parameter of the 'ljuser' shortcode. Once the script is injected, it will be executed whenever a user accesses the page where the shortcode is used.

Remediation

No known patch is available for this vulnerability. Users are advised to review the vulnerability details and consider uninstalling the affected plugin.