CVE Explorer
CVE-2026-3427
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 `jsonText` block attribute in all versions up to, and including, 27.1.1 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.
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"defaultStatus":"unaffected","product":"Yoast SEO – Advanced SEO with real-time guidance and built-in AI","vendor":"yoast","versions":[{"lessThanOrEqual":"27.1.1","status":"affected","version":"0","versionType":"semver"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:64f30a4346ffbc20db2ac09f4f8eb732e6c3edc99a600c296b558e72c3cfc104 · sha256:3fbed36eddf20341… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"baseScore":6.4,"baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:64f30a4346ffbc20db2ac09f4f8eb732e6c3edc99a600c296b558e72c3cfc104 · sha256:3fbed36eddf20341… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-79","description":"CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:64f30a4346ffbc20db2ac09f4f8eb732e6c3edc99a600c296b558e72c3cfc104 · sha256:3fbed36eddf20341… · /containers/cna/problemTypes/0/descriptions/0
Source references
5 source assertions{"url":"https://github.com/Yoast/wordpress-seo/pull/23035"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:64f30a4346ffbc20db2ac09f4f8eb732e6c3edc99a600c296b558e72c3cfc104 · sha256:3fbed36eddf20341… · /containers/cna/references/3
{"url":"https://plugins.trac.wordpress.org/browser/wordpress-seo/tags/27.0/inc/class-wpseo-utils.php#L915"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:64f30a4346ffbc20db2ac09f4f8eb732e6c3edc99a600c296b558e72c3cfc104 · sha256:3fbed36eddf20341… · /containers/cna/references/2
{"url":"https://plugins.trac.wordpress.org/browser/wordpress-seo/tags/27.0/src/generators/schema/howto.php#L125"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:64f30a4346ffbc20db2ac09f4f8eb732e6c3edc99a600c296b558e72c3cfc104 · sha256:3fbed36eddf20341… · /containers/cna/references/1
{"url":"https://plugins.trac.wordpress.org/changeset/3475308/wordpress-seo"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:64f30a4346ffbc20db2ac09f4f8eb732e6c3edc99a600c296b558e72c3cfc104 · sha256:3fbed36eddf20341… · /containers/cna/references/4
{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/fee1fef5-5716-49e0-a04e-d0dae527fcfc?source=cve"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:64f30a4346ffbc20db2ac09f4f8eb732e6c3edc99a600c296b558e72c3cfc104 · sha256:3fbed36eddf20341… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.