{"id":"CVE-2026-9601","aliases":[],"cve":{"records":[{"id":"CVE-2026-9601","source":"Wordfence","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-05-26T15:34:01.308Z","published":"2026-11-07T04:27:12.469Z","modified":"2026-11-07T18:06:07.056Z"}],"publishers":[{"name":"Wordfence","role":"CNA","organizationId":"b15e7b5b-3da4-40ae-a43c-f7aa60e62599","modified":"2026-11-07T04:27:12.469Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-11-07T18:06:07.056Z"}],"references":[{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/1d4da874-23c8-4df4-b776-6046ce8d705a?source=cve","tags":[],"source":"Wordfence"},{"url":"https://plugins.trac.wordpress.org/browser/stackable-ultimate-gutenberg-blocks/tags/3.19.6/src/deprecated/block-defaults/custom-block-styles.php#L223","tags":[],"source":"Wordfence"},{"url":"https://plugins.trac.wordpress.org/browser/stackable-ultimate-gutenberg-blocks/tags/3.19.8/src/deprecated/block-defaults/custom-block-styles.php#L223","tags":[],"source":"Wordfence"},{"url":"https://plugins.trac.wordpress.org/browser/stackable-ultimate-gutenberg-blocks/tags/3.19.8/src/deprecated/block-defaults/custom-block-styles.php#L181","tags":[],"source":"Wordfence"},{"url":"https://plugins.trac.wordpress.org/browser/stackable-ultimate-gutenberg-blocks/tags/3.19.8/src/deprecated/block-defaults/custom-block-styles.php#L155","tags":[],"source":"Wordfence"},{"url":"https://plugins.trac.wordpress.org/browser/stackable-ultimate-gutenberg-blocks/tags/3.19.8/src/deprecated/block-defaults/custom-block-styles.php#L432","tags":[],"source":"Wordfence"},{"url":"https://plugins.trac.wordpress.org/browser/stackable-ultimate-gutenberg-blocks/tags/3.19.6/src/deprecated/block-defaults/custom-block-styles.php#L181","tags":[],"source":"Wordfence"},{"url":"https://plugins.trac.wordpress.org/browser/stackable-ultimate-gutenberg-blocks/tags/3.19.6/src/deprecated/block-defaults/custom-block-styles.php#L155","tags":[],"source":"Wordfence"},{"url":"https://plugins.trac.wordpress.org/browser/stackable-ultimate-gutenberg-blocks/tags/3.19.6/src/deprecated/block-defaults/custom-block-styles.php#L432","tags":[],"source":"Wordfence"},{"url":"https://github.com/gambitph/Stackable/pull/3725","tags":[],"source":"Wordfence"},{"url":"https://plugins.trac.wordpress.org/changeset/3609541/stackable-ultimate-gutenberg-blocks/trunk/src/deprecated/block-defaults/custom-block-styles.php","tags":[],"source":"Wordfence"}],"weaknesses":[{"id":"CWE-79","description":"CWE-79 Improper Neutralization of Input During Web Page Generation","source":"Wordfence"}],"applicability":[],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-11-07T18:01:58.263957Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"no"},{"name":"Technical Impact","value":"partial"}]}]},"title":"Stackable <= 3.19.9 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'save' Parameter","titleSource":"Wordfence","descriptionSource":"Wordfence","description":"The Stackable – Page Builder Gutenberg Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'update_block_style' endpoint in all versions up to, and including, 3.19.9 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.","score":6.4,"severity":"medium","published":"2026-11-07T04:27:12.469Z","modified":"2026-11-07T18:06:07.056Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"bfintal","name":"Stackable – Page Builder Gutenberg Blocks","platforms":[],"versions":[{"version":"0","status":"affected","lessThanOrEqual":"3.19.9","versionType":"semver"}],"defaultStatus":"unaffected","cpes":[],"source":"Wordfence","url":"https://www.cve.org/CVERecord?id=CVE-2026-9601"}],"remediation":[],"references":["https://www.wordfence.com/threat-intel/vulnerabilities/id/1d4da874-23c8-4df4-b776-6046ce8d705a?source=cve","https://plugins.trac.wordpress.org/browser/stackable-ultimate-gutenberg-blocks/tags/3.19.6/src/deprecated/block-defaults/custom-block-styles.php#L223","https://plugins.trac.wordpress.org/browser/stackable-ultimate-gutenberg-blocks/tags/3.19.8/src/deprecated/block-defaults/custom-block-styles.php#L223","https://plugins.trac.wordpress.org/browser/stackable-ultimate-gutenberg-blocks/tags/3.19.8/src/deprecated/block-defaults/custom-block-styles.php#L181","https://plugins.trac.wordpress.org/browser/stackable-ultimate-gutenberg-blocks/tags/3.19.8/src/deprecated/block-defaults/custom-block-styles.php#L155","https://plugins.trac.wordpress.org/browser/stackable-ultimate-gutenberg-blocks/tags/3.19.8/src/deprecated/block-defaults/custom-block-styles.php#L432","https://plugins.trac.wordpress.org/browser/stackable-ultimate-gutenberg-blocks/tags/3.19.6/src/deprecated/block-defaults/custom-block-styles.php#L181","https://plugins.trac.wordpress.org/browser/stackable-ultimate-gutenberg-blocks/tags/3.19.6/src/deprecated/block-defaults/custom-block-styles.php#L155","https://plugins.trac.wordpress.org/browser/stackable-ultimate-gutenberg-blocks/tags/3.19.6/src/deprecated/block-defaults/custom-block-styles.php#L432","https://github.com/gambitph/Stackable/pull/3725","https://plugins.trac.wordpress.org/changeset/3609541/stackable-ultimate-gutenberg-blocks/trunk/src/deprecated/block-defaults/custom-block-styles.php"],"sources":[{"name":"CVE","id":"CVE-2026-9601","modified":"2026-11-07T18:06:07.056Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-9601"}],"assessments":[{"source":"Wordfence","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","score":6.4}],"sourceAffected":[],"observedAt":"2026-11-07T18:17:57.524Z","kev":{"status":"not-listed","checkedAt":"2026-11-14T23:45:30.863Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-11-07T15:10:37.732Z","attemptedAt":"2026-11-07T15:10:37.732Z"},{"source":"GHSA","status":"available","checkedAt":"2026-11-07T15:10:38.498Z","attemptedAt":"2026-11-07T15:10:38.498Z"},{"source":"EUVD","status":"available","checkedAt":"2026-11-07T15:10:41.188Z","attemptedAt":"2026-11-07T15:10:41.188Z"},{"source":"EPSS","status":"available","checkedAt":"2026-11-07T15:10:39.404Z","attemptedAt":"2026-11-07T15:10:39.404Z"}],"evidence":[{"source":"NVD","id":"CVE-2026-9601","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-9601","modified":"2026-11-07T05:19:03.550","score":6.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","checkedAt":"2026-11-07T15:10:37.732Z"},{"source":"GitHub Advisory Database","id":"GHSA-7888-mmrq-c53f","url":"https://github.com/advisories/GHSA-7888-mmrq-c53f","modified":"2026-11-07T06:31:30Z","score":6.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","checkedAt":"2026-11-07T15:10:38.498Z"},{"source":"FIRST EPSS","id":"CVE-2026-9601","url":"https://www.first.org/epss/","probability":0.00307,"percentile":0.23634,"date":"2026-11-07","checkedAt":"2026-11-07T15:10:39.404Z"},{"source":"ENISA EUVD","id":"EUVD-2026-118904","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-118904","modified":"Nov 7, 2026, 4:27:12 AM","score":6.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","checkedAt":"2026-11-07T15:10:41.188Z"}],"aiSummary":{"text":"Stackable – Page Builder Gutenberg Blocks plugin versions up to 3.19.9 have a stored cross-site scripting vulnerability due to insufficient input sanitization, allowing authenticated attackers with contributor-level access to inject scripts. The weakness is improper neutralization of input during web page generation. Impact occurs when a user accesses an injected page.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-11-07T04:36:07.677Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-9601"}]}}