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Description

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.

PUBLISHED Reserved 2026-01-29 | Published 2026-07-10 | Updated 2026-07-10 | Assigner Wordfence




HIGH: 7.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Problem types

CWE-862 Missing Authorization

Product status

Default status
unaffected

Any version
affected

Timeline

2026-02-17:Vendor Notified
2026-07-10:Disclosed

Credits

Osvaldo Noe Gonzalez Del Rio (Os) finder

References

www.wordfence.com/...-10b9-4d43-bf38-f0e8ae25625f?source=cve

plugins.trac.wordpress.org/...seo&old=3474256%40squirrly-seo

cve.org (CVE-2026-1667)

nvd.nist.gov (CVE-2026-1667)

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