{"id":"CVE-2026-4336","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-4336","generatedAt":"2026-10-27T23:58:50.824Z","title":"The Ultimate FAQ Accordion plugin for WordPress is vulnerable to Stored Cross-Site Scripting via FAQ content in all versions up to, and including, 2.4.7.","description":"The Ultimate FAQ Accordion plugin for WordPress is vulnerable to Stored Cross-Site Scripting via FAQ content in all versions up to, and including, 2.4.7. This is due to the plugin calling html_entity_decode() on post_content during rendering in the set_display_variables() function (View.FAQ.class.php, line 746), which converts HTML entity-encoded payloads back into executable HTML, combined with insufficient output escaping in the faq-answer.php template where the decoded content is echoed without wp_kses_post() or any other sanitization. The ufaq custom post type is registered with 'show_in_rest' => true and defaults to 'post' capability_type, allowing Author-level users to create and publish FAQs via the REST API. An Author can submit entity-encoded malicious HTML (e.g., <img src=x onerror=alert()>) which bypasses WordPress's kses sanitization at save time (since kses sees entities as plain text, not tags), but is then decoded back into executable HTML by html_entity_decode() at render time. This makes it possible for authenticated attackers, with Author-level access and above, to inject arbitrary web scripts in FAQ pages that will execute whenever a user accesses an injected FAQ, either directly or via the [ultimate-faqs] shortcode.","published":"2026-04-09T05:16:05.000Z","lastModified":"2026-06-17T10:56:26.000Z","status":"Deferred","sourceIdentifier":"security@wordfence.com","cvss":{"version":"3.1","score":6.4,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N"},"cwe":["CWE-79"],"affected":[],"epss":{"score":0.00227,"percentile":0.13275,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.23%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://plugins.trac.wordpress.org/browser/ultimate-faqs/tags/2.4.7/ewd-ufaq-templates/faq-answer.php#L2","source":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/ultimate-faqs/tags/2.4.7/includes/CustomPostTypes.class.php#L84","source":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/ultimate-faqs/tags/2.4.7/views/View.FAQ.class.php#L746","source":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/ultimate-faqs/trunk/ewd-ufaq-templates/faq-answer.php#L2","source":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/ultimate-faqs/trunk/includes/CustomPostTypes.class.php#L84","source":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/ultimate-faqs/trunk/views/View.FAQ.class.php#L746","source":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3492083%40ultimate-faqs&new=3492083%40ultimate-faqs&sfp_email=&sfph_mail=","source":"security@wordfence.com"},{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/5ac3ac02-d496-46cb-9aff-ffeeb8fd80fa?source=cve","source":"security@wordfence.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-4336","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}