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CVE-2026-8839— MapPress Maps for WordPress <= 2.96.6 - Unauthenticated Insecure Direct Object Reference via REST API Endpoints

Quick assessment

Affected
chrisvrichardson MapPress Maps for WordPress
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin MapPress Maps for WordPress 2.96.6及之前版本存在安全漏洞，该漏洞源于REST API路由缺少所有权验证，可能导致未经验证的攻击者读取敏感地图数据，以及经过身份验证的攻击者修改、删除、

CVSS 5.3 · Medium EPSS 1.30% · P70

Public Exploits 1

Nuclei · 1 CVE-2026-8839.yaml [template]

Affected Version Matrix 1

VendorProduct Version RangeStatus
chrisvrichardson MapPress Maps for WordPress ≤ 2.96.6 affected
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I. Basic Information for CVE-2026-8839

Vulnerability Information
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Vulnerability Title
MapPress Maps for WordPress <= 2.96.6 - Unauthenticated Insecure Direct Object Reference via REST API Endpoints
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress plugin MapPress Maps for WordPress 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin MapPress Maps for WordPress 2.96.6及之前版本存在安全漏洞，该漏洞源于REST API路由缺少所有权验证，可能导致未经验证的攻击者读取敏感地图数据，以及经过身份验证的攻击者修改、删除、
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
chrisvrichardson MapPress Maps for WordPress 0 ~ 2.96.6 -

II. Public POCs for CVE-2026-8839

# POC Description Source Link Shenlong Link
1 MapPress Maps for WordPress <= 2.96.6 contains an authorization bypass caused by missing ownership verification in REST API routes, letting unauthenticated attackers read any map data and authenticated contributors modify any map, exploit requires crafted API requests https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-8839.yaml POC Details
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III. Intelligence Information for CVE-2026-8839

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Patches & Fixes for CVE-2026-8839 (13)

News Coverage for CVE-2026-8839 (1)

Vendor Pages for CVE-2026-8839 (3)

Other References for CVE-2026-8839 (5)

IV. Related Vulnerabilities

Same product: MapPress Maps for WordPress
Same vendor: chrisvrichardson
Same weakness: CWE-639

V. Comments for CVE-2026-8839

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