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WSP MCP Connector CVE-2026-109382

| EUVDEUVD-2026-102794 MEDIUM
Incorrect Authorization (CWE-863)
2026-10-16 Wordfence GHSA-829v-95xx-xwjh
6.5
CVSS 3.1 · Vendor: Wordfence
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Authenticate as Subscriber-level user
  2. Exploit
    Invoke wsp_get_posts MCP tool
  3. Execution
    Supply caller-controlled status=all argument
  4. Impact
    Read metadata and excerpts of all unpublished posts

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Authorization logic validation
MITRE ATT&CK

1 technique across 1 tactic: Privilege Escalation

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Requires the WSP MCP AI Agents Connector plugin (<=2.9.5) installed and active with its MCP endpoint reachable, plus a valid authenticated account at Subscriber level or above (the authenticate() method accepts any logged-in user); exploitation is triggered by calling the wsp_get_posts tool with the caller-supplied status=all argument. Limiting factors: an attacker must hold at least Subscriber credentials, so sites that disable open user registration meaningfully reduce exposure; no non-default configuration is otherwise needed since the tool ships with an empty capability requirement. Disclosure is bounded to post metadata and 40-word excerpts, not full post content.

Impact

This is a genuine but low-urgency issue, not a drive-by threat. The input CVSS of 6.5 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N) reflects network reachability of the MCP endpoint, low attack complexity, and no user interaction, but critically requires PR:L - a valid authenticated account. Per the description the lowest exploitable role is Subscriber, which many WordPress sites expose via open registration, lowering the practical barrier. I disagree with the input's C:H rating: the flaw discloses only metadata (titles, URLs, authors, categories, tags) and 40-word excerpts of unpublished posts, not full draft bodies, so I assess partial confidentiality impact (C:L, ~4.3 Medium) rather than total loss. No EPSS probability, KEV listing, POC, or SSVC decision data was provided in the input, so exploitation-likelihood signals are absent and must be treated as unknown rather than low. Overall this is a targeted information-disclosure bug useful for reconnaissance (leaking embargoed or scheduled editorial content) rather than a critical RCE; patch it in the normal cycle but it does not warrant emergency response absent exploitation evidence.

Exploit ScenarioDerived

An attacker registers or obtains a low-privilege Subscriber account on a site running WSP MCP Connector, then invokes the wsp_get_posts MCP tool with status=all. Because the tool has no capability requirement and the endpoint authenticates any logged-in user, the server returns titles, authors, categories and excerpts of every draft, pending and scheduled post, leaking embargoed or confidential editorial content. No public exploit identified at time of analysis.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.3% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 16, 2026

Authenticated users with Subscriber-level access or above can read the titles, URLs, authors, categories, tags, and 40-word excerpts of every unpublished draft, pending, or scheduled post on WordPress sites running the WSP MCP AI Agents Connector plugin through version 2.9.5. The wsp_get_posts MCP tool is registered with an empty capability requirement, the MCP endpoint's authenticate() method accepts any logged-in user, and the tool's callback honors a caller-supplied status=all argument that expands the underlying WP_Query without an author or ownership filter. No public exploit code or confirmed active exploitation was identified at the time of analysis, and the vendor-assigned CVSS of 6.5 is higher than this assessment's estimate (4.3, C:L) because disclosure is bounded to post metadata and short excerpts rather than full post content.

RemediationAI

No vendor-released patched version is independently confirmed from the provided data, but an upstream fix changeset for the plugin is referenced at https://plugins.trac.wordpress.org/changeset?reponame=&old=3743711%40wsp-mcp-ai-agents-connector&new=3743711%40wsp-mcp-ai-agents-connector; administrators should check the WordPress plugin repository and the vendor advisory at https://www.wordfence.com/threat-intel/vulnerabilities/id/809eb78f-fd8e-4434-a36b-bb8e313cf264?source=cve for the fixed release and upgrade past 2.9.5 as soon as one is published. Because exploitation requires at least a Subscriber-level account, the most effective compensating control is to disable open user registration or otherwise prevent untrusted users from obtaining any role on the site, which removes the prerequisite entirely at the cost of blocking legitimate self-service signups. If the MCP capabilities are not needed, deactivate the WSP MCP AI Agents Connector plugin outright; if they are needed, restrict reachability of the plugin's MCP endpoint (for example via a web-application firewall rule or an IP allowlist) so that only trusted operator addresses can call it, accepting that this may break integrations that connect from dynamic or third-party IP ranges. Auditing existing Subscriber accounts and removing stale ones also reduces exposure, while a code-level hardening that re-registers wsp_get_posts with an explicit capability check should be applied as a temporary patch until the vendor update is installed.

Affected VersionsENISA

WSP MCP – Free MCP Plugin for WordPress: Connect Claude, ChatGPT & AI Agents 0 ≤2.9.5

Affected Packages

euvd wsp_mcp_free_mcp_plugin_for_wordpress_connect_claude_chatgpt_ai_agents no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

The vulnerability is an instance of CWE-863 (Incorrect Authorization) in a WordPress plugin that exposes a Model Context Protocol (MCP) endpoint for AI agents such as Claude and ChatGPT. In versions up to and including 2.9.5, the plugin registers its wsp_get_posts tool with an empty capability requirement (references to includes/tools/native-tools.php#L42 and includes/abilities/posts.php#L7), while the endpoint's authenticate() method accepts any logged-in user (includes/server/class-auth.php#L59 and #L123) and the MCP server dispatch path in includes/server/class-mcp-server.php#L78 does not impose an additional authorization gate. Because the wsp_execute_get_posts() callback honours a caller-supplied status=all argument, it builds a WP_Query spanning 'publish', 'draft', 'pending', and 'future' post statuses with no author or ownership constraint, so an authenticated low-privilege caller can enumerate unpublished posts. The CPE string cpe:2.3:a:bilalnaseer:wsp_mcp_-_free_mcp_plugin_for_wordpress confirms the affected package is the free MCP plugin for WordPress distributed by bilalnaseer. This is an authorization-logic failure, not an authentication bypass in the classic sense: the caller must already hold a valid WordPress session, but the plugin fails to verify that the session is entitled to read the requested post data.

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Severity by source

Vendor (Wordfence) PRIMARY 6.5 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
vuln.today AI 4.3 MEDIUM

Remotely reachable MCP endpoint exploitable by any authenticated Subscriber (PR:L) with no UI; only partial metadata and excerpts leak, so C:L rather than C:H, with no integrity or availability impact.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (Wordfence).

CVSS VectorVendor: Wordfence

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

DescriptionCVE.org

The WSP MCP AI Agents Connector plugin for WordPress is vulnerable to Sensitive Information Disclosure in versions up to, and including, 2.9.5. This is due to the wsp_get_posts MCP tool being registered with an empty capability requirement while the MCP endpoint's authenticate() method accepts any logged-in user, and the wsp_execute_get_posts() callback honouring a caller-supplied status=all argument that expands into a WP_Query over 'publish', 'draft', 'pending' and 'future' posts with no author or ownership filter. This makes it possible for authenticated attackers, with Subscriber-level access and above, to read the titles, URLs, authors, categories, tags and 40-word excerpts of every unpublished (draft/pending/scheduled) post on the site.

Threat Intelligence Overview

EPSS Score
0.3%
Top 73% exploitable
Prevalence
Low
niche free WordPress AI/MCP connector plugin, small install base
Data Quality
5 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.3%
Patch available No
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
No
Human Impact· derived
Medium
Technical Impact
Partial

Priority Score

32
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +32
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

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