CVE-2026-4061: Geo Mashup <= 1.13.18 - Unauthenticated Time-Based SQL Injection via 'map_post_type' Parameter

The Geo Mashup plugin for WordPress is vulnerable to Time-Based SQL Injection via the 'mapposttype' parameter in all versions up to, and including, 1.13.18. This is due to the SearchResults hook explicitly calling stripslashesdeep($POST) which removes WordPress magic quotes protection, followed by the unsanitized mapposttype value being concatenated into an IN(...) clause without escsql() or $wpdb->prepare(). The 'any' branch of the same code correctly applies arraymap('escsql', ...), but the else branch does not. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database via a time-based blind approach. Exploitation requires the Geo Search feature to be enabled in plugin settings.