MapPress Maps For WordPress - Authorization Bypass (CVE-2026-8839)
Description
The MapPress Maps For WordPress plugin for WordPress is vulnerable to Authorization Bypass Through User-Controlled Key in all versions up to, and including, 2.96.6. This is due to missing ownership verification in the REST API routes registered via Mappress_Api::rest_api_init(), where the GET /wp-json/mapp/v1/maps/{mapid} endpoint uses 'permission_callback' => '__return_true' and the write endpoints (POST update, DELETE, PATCH mutate, POST clone, POST empty_trash) only check the generic edit_posts capability without confirming that the requester owns the targeted map — a gap that is not compensated at the model layer, as Mappress_Map::get(), save(), delete(), mutate(), and empty_trash() all operate on any caller-supplied map ID without an ownership check. This makes it possible for unauthenticated attackers to read sensitive map data — including POI titles, addresses, coordinates, and body content — for any map on the site by enumerating map IDs, and for authenticated attackers with Contributor-level access and above to modify, delete, trash/restore, or clone any map regardless of its author.
psychologyCrowdSec Analysis
CVE-2026-8839 is an authorization bypass vulnerability in the MapPress Maps For WordPress plugin, affecting all versions up to 2.96.6. Due to insufficient ownership checks in the plugin's REST API, unauthenticated attackers can enumerate and access sensitive map data, while authenticated users with Contributor-level access or higher can modify, delete, or clone any map regardless of ownership. This flaw exposes map content such as POI titles, addresses, and coordinates, and could be exploited for unauthorized data access or manipulation within WordPress sites using the plugin.
CrowdSec has been tracking this vulnerability and its exploits since 24th of June 2026.
Insights from the CrowdSec network reveal that the attackers trying to exploit CVE-2026-8839 are composed of a fairly even mix of opportunistic and targeted actors. Some attackers employ preliminary reconnaissance, while others use indiscriminate scanning. CrowdSec data also reveals a clear uptick in attacks involving CVE-2026-8839 over the past week. Activity is above the usual baseline, suggesting growing attention from attackers. This may reflect rising awareness, recent exploit releases, or expanded targeting efforts.
Attackers exploit unauthenticated access to the /wp-json/mapp/v1/maps/ REST API endpoint to read arbitrary map data, bypassing ownership checks and exposing sensitive information.
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| Event | Date |
|---|---|
| CVE Published | 2026-06-06 |
| Rule Released | 2026-06-24 |
| CrowdSec First Seen | 2026-06-25 |