Unauthenticated Cross Site Scripting Vulnerability in Squirrly SEO Plugin
CVE-2026-66664

7.1HIGH

Key Information:

Vendor

WordPress
Status
Seo Plugin By Squirrly Seo
Vendor
CVE Published:
6 August 2026

What is CVE-2026-66664?

The Squirrly SEO Plugin for WordPress is susceptible to an unauthenticated Cross Site Scripting (XSS) vulnerability in versions up to 14.2.0. This flaw allows attackers to inject malicious scripts into web pages viewed by users, potentially leading to session hijacking, data theft, and further exploitation of site visitors. Prompt updates and security measures are essential to mitigate the risks associated with this vulnerability and to protect your website and its users.

Affected Version(s)

SEO Plugin by Squirrly SEO <= 14.2.0

References

https://patchstack.com/database/wordpress/plugin/squirrly...
vdb-entry

CVSS V3.1

Score:
7.1
Severity:
HIGH
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

daroo | Patchstack Bug Bounty Program
.