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Vulnerability record · CVE-2026-1667 · published 10 July 2026

CVE-2026-1667: Missing authorization vulnerability

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.

7.2 CVSS 3.1 High EPSS 0.31% · top 78.5% CWE-862 · Missing authorization Deferred
7.2CVSS 3.1 base score
0.31%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
10 Jul 2026Last modified by NVD

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.

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

References

LinkTags
https://plugins.trac.wordpress.org/changeset?reponame=&new=3586051%40squirrly-seo&old=3474256%40squirrly-seo
https://www.wordfence.com/threat-intel/vulnerabilities/id/aebdd464-10b9-4d43-bf38-f0e8ae25625f?source=cve

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Source: NIST National Vulnerability Database (record CVE-2026-1667), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.