The Activity Log – Monitor & Record User Changes plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the event parameters in all versions up to, and including, 2.11.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever an administrative user accesses an injected page.
Multiple cross-site scripting (XSS) vulnerabilities in the Activity Log plugin before 2.4.1 for WordPress allow remote attackers to inject arbitrary JavaScript or HTML via a title that is not escaped.