CVE-2026-1293
Yoast SEO <= 26.8 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'yoast-schema' Block Attribute
CVSS Score
6.4
EPSS Score
0.0%
EPSS Percentile
0th
The Yoast SEO – Advanced SEO with real-time guidance and built-in AI plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the the `yoast-schema` block attribute in all versions up to, and including, 26.8 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
| CWE | CWE-79 |
| Vendor | yoast |
| Product | yoast seo – advanced seo with real-time guidance and built-in ai |
| Published | Feb 6, 2026 |
| Last Updated | Apr 8, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
yoast / Yoast SEO – Advanced SEO with real-time guidance and built-in AI
0 ≤ 26.8
References
wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/8b2e7c2d-ed2f-439b-9cee-f2e5d46121b6?source=cve plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/wordpress-seo/tags/26.8/src/presenters/schema-presenter.php#L49 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/wordpress-seo/tags/26.8/inc/class-wpseo-utils.php#L915 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/wordpress-seo/tags/26.8/src/generators/schema-generator.php#L188
Credits
suyoung kim