CVE-2026-66664: WordPress SEO plugin by Squirrly SEO plugin <= 14.2.0 - Cross Site Scripting (XSS) vulnerability
Unauthenticated Cross Site Scripting (XSS) in SEO Plugin by Squirrly SEO <= 14.2.0 versions.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
WordPress SEO Plugin by Squirrly SEOto a version that resolves this vulnerability.Fixed in 14.2.1 - Compensating control
Until the Squirrly SEO WordPress plugin is updated past 14.2.0, restrict access to the WordPress site (especially any pages/posts where the plugin outputs content) to reduce the likelihood of exploiting the unauthenticated XSS.
Event History
Frequently Asked Questions
What is the severity of CVE-2026-66664?
The severity of CVE-2026-66664 is rated high with a score of 7.1.
How do I fix CVE-2026-66664?
To fix CVE-2026-66664, update the Squirrly SEO plugin to version 14.2.1 or later.
What type of vulnerability is CVE-2026-66664?
CVE-2026-66664 is an unauthenticated Cross Site Scripting (XSS) vulnerability.
What impact does CVE-2026-66664 have?
CVE-2026-66664 can allow attackers to execute scripts in the context of an affected website, potentially leading to data theft or manipulation.
Who is affected by CVE-2026-66664?
Users of the Squirrly SEO plugin versions 14.2.0 and earlier are affected by CVE-2026-66664.