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CVE-2026-8839 medium CVSS 5.3

Vulnerability in MapPress Maps for (WordPress plugin) (CVE-2026-8839)

Summary

Vulnerability in MapPress Maps for (WordPress plugin) (CVE-2026-8839). Risk of unauthorized operations or information disclosure. Exploitable via edit_posts.

Original description

The description as published by the source.

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: GitHub Security Advisories (Global) NVD GitHub Advisory

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A vulnerability tracked as CVE-2026-8839 has been found in MapPress Maps for (WordPress plugin).
Attackers can target a specific entry point like edit_posts over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 5.3/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "MapPress Maps for (WordPress plugin) CVE-2026-8839" on the vendor's site.

CVE-2026-8839 (MapPress Maps for (WordPress plugin)) — CWE-639 / CVSS v3 5.3
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Attack surface: edit_posts
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.

❓ What is the problem

A vulnerability (CWE-639) exists in MapPress Maps for (WordPress plugin). Attackers reach the vulnerable code path via edit_posts without authentication.

📍 Affected scope

Check the vendor advisory for the affected versions of MapPress Maps for (WordPress plugin). Attack surface: edit_posts.

🔥 Severity

Severity: Medium (CVSS 5.3/10). Risk of unauthorized operations or information disclosure.

🔧 How to fix

Update to the patched release per vendor advisory.

🛡️ Workaround

Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.

🔍 Detection

Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

  1. 1
    Identify exposure identify 
    Audit SBOM/dependencies for affected components.

    資産台帳・SBOM・依存マニフェストで MapPress Maps for (WordPress plugin) を使っているサービスとバージョンを洗い出す。

  2. 2
    Post-deployment verification verify 
    Confirm patched version is live in production

    パッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。

References

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