CVE-2026-66464
Received Received - Intake

Unauthenticated Broken Access Control in Internal Link Optimiser

Publication date: 2026-08-13

Last updated on: 2026-08-13

Assigner: Patchstack

Description
Unauthenticated Broken Access Control in Internal Link Optimiser <= 5.2.7 versions.

CVSS Scores

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Meta Information

Published
2026-08-13
Last Modified
2026-08-13
Generated
2026-08-13
AI Q&A
2026-08-13
EPSS Evaluated
N/A
NVD
CVE-2026-66464
EUVD
EUVD-2026-57883

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
patchstack internal_link_optimiser to 5.2.7 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-862 The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

Attack-Flow Graph

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Executive Summary

This is an Unauthenticated Broken Access Control vulnerability in the WordPress Internal Link Optimiser Plugin versions 5.2.7 and below. It allows unauthenticated users to perform actions requiring higher privileges due to missing authorization, authentication, or nonce token checks. The vulnerability has a CVSS score of 6.5 and is classified as medium priority.

Detection Guidance

Check if the Internal Link Optimiser plugin version 5.2.7 or below is installed on your WordPress site. Look for unauthorized modifications to internal links or unexpected changes in site structure.

Impact Analysis

Unauthenticated attackers could exploit this to perform privileged actions on affected websites. This may lead to unauthorized changes, data exposure, or site takeover. The vulnerability could be used in mass campaigns targeting many websites, increasing the risk of widespread impact.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, which may violate compliance requirements under GDPR, HIPAA, or other regulations. Unauthorized changes or data exposure could result in legal penalties, reputational damage, and loss of trust.

Mitigation Strategies

Apply the mitigation rule provided by Patchstack to block attacks. Update the plugin to the latest version if available. Contact your hosting provider or web developer for assistance if an official patch is not yet released.

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