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MarketKing EUVDEUVD-2026-70970

| CVE-2026-85311 MEDIUM
Missing Authorization (CWE-862)
2026-09-04 Patchstack GHSA-4j6r-jmmc-298x
5.3
CVSS 3.1 · Vendor: Patchstack
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Attack ChainAIDerived

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

  1. Access
    Identify WordPress site running MarketKing ≤2.1.60
  2. Delivery
    Send unauthenticated HTTP request to unprotected endpoint
  3. Exploit
    Missing authorization check bypassed silently
  4. Execution
    Unauthorized marketplace action executed
  5. Impact
    Partial integrity modification achieved

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Authorization checks on every request
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

No special conditions - remote unauthenticated exploitation against default configurations of the MarketKing plugin (WordPress WooCommerce multivendor marketplace) through version 2.1.60. The CVSS vector AV:N/AC:L/PR:N/UI:N/S:U confirms network-accessible exploitation requiring no credentials and no user interaction. Exploitation is limited to sites running MarketKing ≤2.1.60 on WordPress with WooCommerce; the integrity impact is partial (I:L) with no confidentiality or availability impact, and scope is unchanged (S:U), meaning the attacker cannot pivot to other system components via this flaw alone.

Impact

CVSS 5.3 Medium with AV:N/AC:L/PR:N/UI:N/S:U reflects a remotely exploitable, low-complexity flaw with no authentication required, but the impact ceiling is limited - C:N and A:N constrain the worst case to partial integrity modification (I:L). No KEV listing and no public POC are identified at time of analysis, lowering urgency relative to the attack vector breadth. For WordPress/WooCommerce multivendor marketplace operators, the real-world risk is moderate: unauthenticated actors could manipulate marketplace state, but cannot exfiltrate data or crash the service via this flaw alone. The absence of an exact patched version in the advisory data is a minor gap; defenders should upgrade beyond 2.1.60 and monitor Patchstack for confirmation.

Exploit ScenarioDerived

An unauthenticated attacker sends a crafted HTTP request to a WordPress site running MarketKing ≤2.1.60, targeting an endpoint that lacks proper capability checks. Because the authorization check is absent, the request is processed and the attacker can modify marketplace state - such as altering vendor listings, product settings, or order data - without holding any account on the site. No public POC is identified at time of analysis.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Sep 04, 2026

Missing Authorization in MarketKing WordPress plugin (≤2.1.60) allows unauthenticated remote attackers to perform integrity-affecting actions by exploiting incorrectly configured access control security levels. The CVSS vector (PR:N/UI:N/AV:N) confirms no authentication or user interaction is required. No public exploit or CISA KEV listing identified at time of analysis; impact is limited to partial integrity (C:N/A:N) per CVSS.

RemediationAI

Update the MarketKing plugin to a version beyond 2.1.60 as soon as a patched release is available; consult the Patchstack advisory at https://patchstack.com/database/wordpress/plugin/marketking-multivendor-marketplace-for-woocommerce/vulnerability/wordpress-marketking-plugin-2-1-60-broken-access-control-vulnerability for the confirmed fix version, which is not specified in currently available data. As a compensating control while patching is pending, restrict access to the MarketKing plugin's AJAX and REST API endpoints at the web-server or WAF layer for unauthenticated requests - note this may break public-facing marketplace browsing functionality and should be tested before deployment. WordPress administrators should also verify that the site's user-role permissions for vendor-facing endpoints are correctly scoped.

Affected VersionsENISA

MarketKing n/a ≤2.1.60

Affected Packages

euvd marketking 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

MarketKing is a multivendor marketplace plugin for WooCommerce on WordPress, enabling vendors to list products and manage storefronts. CWE-862 (Missing Authorization) indicates the plugin fails to verify whether the requesting user holds sufficient privileges before executing certain actions - distinct from authentication bypass (CWE-287) in that the check is absent rather than circumvented. The CPE cpe:2.3:a:kings_plugins:marketking:*:*:*:*:*:*:*:* scopes the affected surface to all versions through 2.1.60 inclusive.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (Patchstack) PRIMARY 5.3 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
vuln.today AI 5.3 MEDIUM

Unauthenticated network access with no complexity; missing authorization yields only partial integrity modification, no confidentiality or availability impact.

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

Primary rating from Vendor (Patchstack).

CVSS VectorVendor: Patchstack

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

DescriptionCVE.org

Missing Authorization vulnerability in Kings Plugins MarketKing allows Exploiting Incorrectly Configured Access Control Security Levels.

This issue affects MarketKing: from n/a through 2.1.60.

Threat Intelligence Overview

EPSS Score
0.2%
Top 93% exploitable
Prevalence
Medium
popular WooCommerce multivendor marketplace plugin for WordPress
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 0.2%
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· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact· derived
Medium

Priority Score

26
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +26
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.

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