What is the CVSS score of CVE-2026-1667?

CVE-2026-1667 has a CVSS 3.1 base score of 7.2 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.2%.

Which versions of Wordpress Plugin are affected by CVE-2026-1667?

Squirrly SEO WordPress plugin (versions through 14.0.0) allows unauthenticated attackers to create malicious posts and inject persistent cross-site scripts affecting all site visitors and…

How to fix or mitigate CVE-2026-1667?

Within 24 hours: identify and disable or remove Squirrly SEO plugin (versions 14.0.0 and earlier) from all WordPress installations. Within 7 days: scan WordPress audit logs for unauthorized post creation or Active Custom Fields modifications; inspect recent posts for injected scripts or suspicious content. Within 30 days: monitor Squirrly for a vendor patch; upon release, update to the patched version, restore the plugin with validated access controls, and verify no residual malicious content remains.

Wordpress Plugin CVE-2026-1667

EUVD-2026-42949 HIGH

Missing Authorization (CWE-862)

2026-07-10 Wordfence

GHSA-x8f2-2f6r-99xx

WordPress XSS Authentication Bypass Wordpress Plugin Geo Plugin By Squirrly Seo

7.2

CVSS 3.1 · Vendor: Wordfence

Severity by source

Vendor (Wordfence) PRIMARY

7.2 HIGH

AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Primary rating from Vendor (Wordfence) · only source for this CVE.

CVSS VectorVendor: Wordfence

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Jul 10, 2026 - 17:31 vuln.today

CVE Published

Jul 10, 2026 - 16:32 nvd

HIGH 7.2

DescriptionCVE.org

The SEO Plugin by Squirrly SEO plugin for WordPress is vulnerable to Arbitrary Post Creation and Stored Cross-Site Scripting in all versions up to, and including, 14.0.0 due to a leak of an API token and insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to create arbitrary posts, and, if the Advanced Custom Fields plugin is installed and activated, inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

AnalysisAI

Missing authorization in the Squirrly SEO plugin for WordPress (all versions through 14.0.0) lets unauthenticated attackers create arbitrary posts by abusing a leaked API token, and — when the Advanced Custom Fields (ACF) plugin is also active — plant stored cross-site scripting that fires whenever any user views the injected page. Wordfence rates it CVSS 7.2 with scope change because a single unauthenticated request can seed persistent content and script that later executes in visitors' and administrators' browsers. There is no public exploit identified at time of analysis and it is not on CISA KEV, but the unauthenticated, low-complexity nature makes it an attractive target for automated WordPress campaigns.