Unauthorized Sitemap Generation in WP Meta SEO Plugin for WordPress

CVE-2023-1027

What is CVE-2023-1027?

The WP Meta SEO plugin for WordPress has a vulnerability that allows authenticated users with subscriber-level access to generate unauthorized sitemaps. This flaw arises from a missing capability check in the checkAllCategoryInSitemap function, which fails to properly restrict access. The plugin's reliance on nonce checks for access control is inadequate, as the nonce is exposed to all authenticated users, regardless of their assigned role. As a result, potential attackers can exploit this weakness to access sensitive post categories.

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