CVE-2026-39720

The Mapster WP Maps WordPress plugin before 2.0.6 does not perform any authorization check on a REST API route that writes post data. This allows unauthenticated attackers to overwrite the title of arbitrary posts, create arbitrary published posts, and overwrite the plugin's stored settings.

The Mapster WP Maps plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 2.0.5. This is due to the /wp-json/mapster-wp-maps/save-mapmaker REST route being registered with a permission_callback that unconditionally returns true (no capability check, no nonce), together with the mapster_write_config_to_acf() helper only sanitizing string config values with sanitize_text_field() — which strips HTML tags but leaves quote characters intact — and the mapster_wp_map shortcode renderer in mapster_wordpress_maps_shortcode_display() concatenating the stored loading_background_color value into a single-quoted inline style attribute without esc_attr(). This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

The Mapster WP Maps plugin for WordPress is vulnerable to Arbitrary User Meta Write in all versions up to and including 1.23.0 via the my_profile_update() function. The lack of nonce verification, capability checks, and meta key validation allows an authenticated attacker with Subscriber-level access to modify arbitrary user metadata.

The Mapster WP Maps plugin for WordPress (versions up to and including 1.20.0) is vulnerable to Stored Cross-Site Scripting via multiple fields due to insufficient input sanitization and output escaping. An authenticated attacker with contributor-level permissions and above can inject arbitrary web scripts into pages that will execute whenever a user accesses an injected page.