---
id: CVE-2026-66664
title: >-
  Unauthenticated Cross Site Scripting (XSS) in SEO Plugin by Squirrly SEO <=
  14.2.0 versions.
summary: >-
  Unauthenticated Cross Site Scripting (XSS) in SEO Plugin by Squirrly SEO <=
  14.2.0 versions.
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L'
cwe:
  - CWE-79
published: '2026-08-06'
updated: '2026-08-08'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-66664'
references:
  - url: >-
      https://patchstack.com/database/wordpress/plugin/squirrly-seo/vulnerability/wordpress-seo-plugin-by-squirrly-seo-plugin-14-1-1-reflected-cross-site-scripting-xss-vulnerability?_s_id=cve
    label: audit@patchstack.com
tags:
  - nvd
epss: 0.00186
epssPercentile: 0.08406
ingestedAt: '2026-08-08T21:30:13.523Z'
---

## Overview

Unauthenticated Cross Site Scripting (XSS) in SEO Plugin by Squirrly SEO <= 14.2.0 versions.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.