# CVE-2026-8839: MapPress Maps For WordPress - Authorization Bypass

> Live exploitation tracking for CVE-2026-8839 by the CrowdSec Live Exploit Tracker, built from real-world attack data crowdsourced from CrowdSec's global network.

Page: https://tracker.crowdsec.net/cves/CVE-2026-8839

## Key facts

- **Exploitation phase:** Limited Exploitation. The vulnerability is known but shows very limited attacker interest or exploitation activity.
- **CVSS score:** 5.3
- **Public exploit available:** Yes
- **Affected products:** Chrisvrichardson MapPress Maps For WordPress
- **Weaknesses:** CWE-639 (Authorization Bypass Through User-Controlled Key)
- **Tags:** wordpress, cms

## 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.

## CrowdSec analysis

[CVE-2026-8839](https://euvd.enisa.europa.eu/vulnerability/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.

According to CrowdSec data, while opportunistic exploitation dominates, a portion of threat actors trying to exploit CVE-2026-8839 apply basic targeting methods such as port or service detection. This indicates emerging patterns of selective targeting.
Additionally, according to week-over-week analysis by CrowdSec, exploitation of CVE-2026-8839 is surging. Attack volumes are spiking well above historical norms, indicating widespread and escalating interest from threat actors. CVE-2026-8839 is currently experiencing high visibility and active exploitation across the internet.

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.

## Timeline

- 2026-06-06: CVE Published. CVE-2026-8839 is published to NVD.
- 2026-06-24: Rule Released. CrowdSec releases a rule to detect CVE-2026-8839 exploitation attempts against the CrowdSec Network.
- 2026-06-25: CrowdSec First Seen. CrowdSec observes in-the-wild exploitation of CVE-2026-8839 for the first time.

## References

- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-8839.yaml

## Live exploitation data

The [Live Exploit Tracker page](https://tracker.crowdsec.net/cves/CVE-2026-8839) follows observed exploitation activity for CVE-2026-8839. [Request an API key](https://tracker.crowdsec.net/request-api-key) for full access to its exploitation timeline, attacking IP addresses and blocklists.