All in One SEO WordPress Plugin Stored Cross-Site Scripting Vulnerability

A stored cross-site scripting vulnerability has been identified in the All in One SEO WordPress plugin, specifically in versions through 4.8.1.1. This vulnerability arises from inadequate input sanitization and output escaping, allowing authenticated attackers with Contributor-level access or higher to inject arbitrary scripts into the post Meta Description and Canonical URL fields. The injected scripts are executed when a user views 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.

Remediation

Users are advised to update the All in One SEO WordPress plugin to version 4.8.2 or a newer patched version.