CVE-2026-66614
Deferred Deferred - Pending Action

Unauthenticated XSS in Squirrly SEO Plugin

Publication date: 2026-08-20

Last updated on: 2026-08-20

Assigner: Patchstack

Description
Unauthenticated Cross Site Scripting (XSS) in SEO Plugin by Squirrly SEO <= 14.2.2 versions.

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Meta Information

Published
2026-08-20
Last Modified
2026-08-20
Generated
2026-08-20
AI Q&A
2026-08-20
EPSS Evaluated
N/A
NVD
CVE-2026-66614
EUVD
EUVD-2026-63298

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
squirrly seo_plugin to 14.2.2 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

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Executive Summary

This is an Unauthenticated Cross Site Scripting (XSS) vulnerability found in the SEO Plugin by Squirrly SEO versions up to and including 14.2.2. XSS allows attackers to inject malicious scripts into web pages viewed by other users without needing authentication.

Detection Guidance

This vulnerability is specific to the SEO Plugin by Squirrly SEO versions <= 14.2.2. To detect it, check if the plugin is installed and verify its version. Look for unusual input fields or parameters in web forms that might accept unsanitized user input.

Impact Analysis

An attacker could exploit this to steal user sessions, deface websites, or redirect users to malicious sites. It may also enable theft of sensitive data like cookies or personal information if users interact with the compromised pages.

Compliance Impact

This vulnerability could lead to unauthorized access to user data, violating GDPR's data protection requirements. For HIPAA, it may expose protected health information, risking compliance with security and privacy rules.

Mitigation Strategies

Immediately update the SEO Plugin by Squirrly SEO to the latest version if an update is available. If no update exists, consider disabling or removing the plugin until a patch is released. Implement input validation and output encoding on all user-supplied data.

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