Simple Nivo Slider Stored Cross-Site Scripting Vulnerability

A stored cross-site scripting vulnerability has been identified in the Simple Nivo Slider plugin for WordPress, affecting all versions through 0.5.6. 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 'id' shortcode parameter. 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 by using the 'id' shortcode parameter. The injected scripts will be executed when the page is accessed by a user.

Remediation

No known patch is available for this vulnerability. It is recommended to review the vulnerability details and consider uninstalling the affected plugin.