chrisvrichardson MapPress Maps for WordPress Plugin up to 2.96.6 on WordPress REST API /wp-json/mapp/v1/maps rest_api_init authorization

Summaryinfo

A vulnerability categorized as critical has been discovered in chrisvrichardson MapPress Maps for WordPress Plugin up to 2.96.6 on WordPress. The affected element is the function Mappress_Api::rest_api_init of the file /wp-json/mapp/v1/maps of the component REST API. Executing a manipulation can lead to authorization. The identification of this vulnerability is CVE-2026-8839. The attack may be launched remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in chrisvrichardson MapPress Maps for WordPress Plugin up to 2.96.6 on WordPress. It has been declared as critical. This vulnerability affects the function Mappress_Api::rest_api_init of the file /wp-json/mapp/v1/maps of the component REST API. The manipulation with an unknown input leads to a authorization vulnerability. The CWE definition for the vulnerability is CWE-639. The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was shared by Kitch Global. The advisory is available at wordfence.com. This vulnerability was named CVE-2026-8839 since 05/18/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit.

Upgrading to version 2.95.10 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-34957). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• WordPress Plugin

Vendor

• chrisvrichardson

Name

• MapPress Maps for WordPress Plugin

Version

• 2.96.0
• 2.96.1
• 2.96.2
• 2.96.3
• 2.96.4
• 2.96.5
• 2.96.6

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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