{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-3604", "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599", "state": "PUBLISHED", "assignerShortName": "Wordfence", "dateReserved": "2026-03-05T15:22:24.895Z", "datePublished": "2026-05-12T07:48:19.050Z", "dateUpdated": "2026-05-12T12:45:06.844Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599", "shortName": "Wordfence", "dateUpdated": "2026-05-12T07:48:19.050Z"}, "affected": [{"vendor": "kcseopro", "product": "WP SEO Structured Data Schema", "versions": [{"version": "0", "status": "affected", "lessThanOrEqual": "2.8.1", "versionType": "semver"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "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."}], "title": "WP SEO Structured Data Schema <= 2.8.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via '_kcseo_ative_tab' Parameter", "references": [{"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/315fbc93-5af3-4fe9-b97a-a09957e54c97?source=cve"}, {"url": "https://plugins.trac.wordpress.org/browser/wp-seo-structured-data-schema/trunk/lib/classes/KcSeoMetaData.php#L133"}, {"url": "https://plugins.trac.wordpress.org/browser/wp-seo-structured-data-schema/tags/2.8.1/lib/classes/KcSeoMetaData.php#L133"}, {"url": "https://plugins.trac.wordpress.org/browser/wp-seo-structured-data-schema/trunk/lib/classes/KcSeoMetaData.php#L177"}, {"url": "https://plugins.trac.wordpress.org/browser/wp-seo-structured-data-schema/tags/2.8.1/lib/classes/KcSeoMetaData.php#L177"}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", "cweId": "CWE-79", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N", "baseScore": 4.9, "baseSeverity": "MEDIUM"}}], "credits": [{"lang": "en", "type": "finder", "value": "Muhammad Yudha - DJ"}], "timeline": [{"time": "2026-05-11T19:10:33.000Z", "lang": "en", "value": "Disclosed"}]}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-05-12T12:44:53.194301Z", "id": "CVE-2026-3604", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-12T12:45:06.844Z"}}]}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-3604", "lastModified": "2026-05-12T09:16:40.810", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 2.7, "source": "security@wordfence.com", "type": "Primary"}]}, "published": "2026-05-12T09:16:40.810", "references": [{"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/wp-seo-structured-data-schema/tags/2.8.1/lib/classes/KcSeoMetaData.php#L133"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/wp-seo-structured-data-schema/tags/2.8.1/lib/classes/KcSeoMetaData.php#L177"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/wp-seo-structured-data-schema/trunk/lib/classes/KcSeoMetaData.php#L133"}, {"source": "security@wordfence.com", "url": "https://plugins.trac.wordpress.org/browser/wp-seo-structured-data-schema/trunk/lib/classes/KcSeoMetaData.php#L177"}, {"source": "security@wordfence.com", "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/315fbc93-5af3-4fe9-b97a-a09957e54c97?source=cve"}], "sourceIdentifier": "security@wordfence.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "security@wordfence.com", "type": "Primary"}]}

{}

{"created": "2026-05-12T10:30:13.671319+00:00", "updated": "2026-05-12T10:30:13.671329+00:00", "vendors": []}