{"id":"CVE-2026-101935","aliases":[],"title":"Echo Knowledge Base <= 17.214.0 - Reflected Cross-Site Scripting via 'new_kb_config' Parameter","titleSource":"Wordfence","descriptionSource":"Wordfence","products":[{"vendor":"echoplugins","name":"Echo Knowledge Base – Documentation, FAQs, Chat & Smart Search","platforms":[],"versions":[{"version":"0","status":"affected","lessThanOrEqual":"17.214.0","versionType":"semver"}],"defaultStatus":"unaffected","source":"Wordfence","url":"https://www.cve.org/CVERecord?id=CVE-2026-101935"}],"remediation":[],"description":"The Echo Knowledge Base – Documentation, FAQs, Chat & Smart Search plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'new_kb_config' parameter (specifically the article-mobile-break-point-v2 key, among other config keys interpolated into the <style> element) in versions up to, and including, 17.214.0 This is due to insufficient input sanitization and output escaping in EPKB_Frontend_Editor::fe_preview_config() and EPKB_Articles_Setup: on every knowledge base article page view, when the request supplies epkb_fe_reload_mode=on, an attacker-controlled JSON blob is merged over the stored KB configuration and several values are concatenated directly into a stylesheet emitted inside a literal <style> element without escaping (minify_css() does not strip <, > or /). This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user (with Editor-level access or above, holding the manage_categories capability, or an Administrator) into performing an action such as clicking on a specially crafted link.","severity":"medium","score":6.1,"published":"2026-10-28T07:48:29.075Z","modified":"2026-10-28T07:48:29.075Z","withdrawn":false,"knownExploited":false,"affected":[],"references":["https://www.wordfence.com/threat-intel/vulnerabilities/id/3bfab9cf-4ccb-45fc-83ce-b5250f0f6482?source=cve","https://plugins.trac.wordpress.org/browser/echo-knowledge-base/tags/17.214.0/includes/features/articles/class-epkb-articles-setup.php#L319","https://plugins.trac.wordpress.org/browser/echo-knowledge-base/tags/17.214.0/includes/features/articles/class-epkb-articles-setup.php#L131","https://plugins.trac.wordpress.org/browser/echo-knowledge-base/tags/17.214.0/includes/admin/editor/class-epkb-frontend-editor.php#L848","https://plugins.trac.wordpress.org/browser/echo-knowledge-base/tags/17.214.0/includes/admin/editor/class-epkb-frontend-editor.php#L1072","https://plugins.trac.wordpress.org/browser/echo-knowledge-base/tags/17.214.0/includes/class-epkb-utilities.php#L836","https://plugins.trac.wordpress.org/browser/echo-knowledge-base/tags/17.214.0/includes/features/layouts/class-epkb-layouts-setup.php#L45","https://plugins.trac.wordpress.org/changeset/3727663/echo-knowledge-base/trunk/includes/admin/editor/class-epkb-frontend-editor.php","https://plugins.trac.wordpress.org/changeset?reponame=&new=3727647%40echo-knowledge-base%2Ftags%2F17.311.0&old=3672811%40echo-knowledge-base%2Ftags%2F17.214.0"],"sources":[{"name":"CVE","id":"CVE-2026-101935","modified":"2026-10-28T07:48:29.075Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-101935"}],"assessments":[{"source":"Wordfence","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1}],"sourceAffected":[],"kev":{"status":"not-listed","checkedAt":"2026-10-29T04:05:30.302Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-10-28T09:15:33.311Z","attemptedAt":"2026-10-28T09:15:33.311Z"},{"source":"GHSA","status":"refresh-failed","attemptedAt":"2026-10-28T09:15:33.319Z"},{"source":"EUVD","status":"available","checkedAt":"2026-10-28T09:15:33.319Z","attemptedAt":"2026-10-28T09:15:33.319Z"},{"source":"EPSS","status":"no-result","checkedAt":"2026-10-28T09:15:34.564Z","attemptedAt":"2026-10-28T09:15:34.564Z"}],"evidence":[{"source":"NVD","id":"CVE-2026-101935","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-101935","modified":"2026-10-28T08:16:29.567","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","checkedAt":"2026-10-28T09:15:33.311Z"},{"source":"ENISA EUVD","id":"EUVD-2026-111818","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-111818","modified":"Oct 28, 2026, 7:48:29 AM","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","checkedAt":"2026-10-28T09:15:33.319Z"}]}