CVE Explorer
CVE-2026-3604
The WP SEO Structured Data Schema plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `_kcseo_ative_tab` parameter in all versions up to, and including, 2.8.1 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":"WP SEO Structured Data Schema","vendor":"kcseopro","versions":[{"lessThanOrEqual":"2.8.1","status":"affected","version":"0","versionType":"semver"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:b8e707886fa8067768c7f1941f6903c25c82740d6b9dbe136b7c9430cd9d516e · sha256:51a4a94656f9a8b8… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"baseScore":4.9,"baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:H/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:b8e707886fa8067768c7f1941f6903c25c82740d6b9dbe136b7c9430cd9d516e · sha256:51a4a94656f9a8b8… · /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:b8e707886fa8067768c7f1941f6903c25c82740d6b9dbe136b7c9430cd9d516e · sha256:51a4a94656f9a8b8… · /containers/cna/problemTypes/0/descriptions/0
Source references
5 source assertions{"url":"https://plugins.trac.wordpress.org/browser/wp-seo-structured-data-schema/tags/2.8.1/lib/classes/KcSeoMetaData.php#L133"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:b8e707886fa8067768c7f1941f6903c25c82740d6b9dbe136b7c9430cd9d516e · sha256:51a4a94656f9a8b8… · /containers/cna/references/2
{"url":"https://plugins.trac.wordpress.org/browser/wp-seo-structured-data-schema/tags/2.8.1/lib/classes/KcSeoMetaData.php#L177"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:b8e707886fa8067768c7f1941f6903c25c82740d6b9dbe136b7c9430cd9d516e · sha256:51a4a94656f9a8b8… · /containers/cna/references/4
{"url":"https://plugins.trac.wordpress.org/browser/wp-seo-structured-data-schema/trunk/lib/classes/KcSeoMetaData.php#L133"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:b8e707886fa8067768c7f1941f6903c25c82740d6b9dbe136b7c9430cd9d516e · sha256:51a4a94656f9a8b8… · /containers/cna/references/1
{"url":"https://plugins.trac.wordpress.org/browser/wp-seo-structured-data-schema/trunk/lib/classes/KcSeoMetaData.php#L177"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:b8e707886fa8067768c7f1941f6903c25c82740d6b9dbe136b7c9430cd9d516e · sha256:51a4a94656f9a8b8… · /containers/cna/references/3
{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/315fbc93-5af3-4fe9-b97a-a09957e54c97?source=cve"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:b8e707886fa8067768c7f1941f6903c25c82740d6b9dbe136b7c9430cd9d516e · sha256:51a4a94656f9a8b8… · /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.