Steffin

**Name of the Vulnerable Software and Affected Versions** WP-UserOnline plugin for WordPress versions up to, and including, 2.87.6 **Description** The issue is related to Stored Cross-Site Scripting via the `templates[browsingpage][text]` parameter due to insufficient input sanitization and output escaping. This allows authenticated attackers with administrative capabilities and above to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The issue only affects multi-site installations and installations where unfiltered html is disabled. **Recommendations** For WP-UserOnline plugin for WordPress versions up to, and including, 2.87.6, update to a version higher than 2.87.6 to resolve the issue. As a temporary workaround, consider restricting access to the `templates[browsingpage][text]` parameter to minimize the risk of exploitation.