{"id":"CVE-2026-101935","title":"Echo Knowledge Base <= 17.214.0 - Reflected Cross-Site Scripting via 'new_kb_config' Parameter","summary":"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 co…","severity":"medium","cvss":6.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","cvssSource":"cna","cwe":["CWE-79"],"vendor":"echoplugins","product":"Echo Knowledge Base – Documentation, FAQs, Chat & Smart Search","affected":["echo_knowledge_base_documentation_faqs_chat_smart_search <= 17.214.0"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-29T01:28:44.586449Z"},"published":"2026-10-28","updated":"2026-10-29","sourceUpdated":"2026-10-29T01:41:50.091Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-101935","references":[{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/3bfab9cf-4ccb-45fc-83ce-b5250f0f6482?source=cve"},{"url":"https://plugins.trac.wordpress.org/browser/echo-knowledge-base/tags/17.214.0/includes/features/articles/class-epkb-articles-setup.php#L319"},{"url":"https://plugins.trac.wordpress.org/browser/echo-knowledge-base/tags/17.214.0/includes/features/articles/class-epkb-articles-setup.php#L131"},{"url":"https://plugins.trac.wordpress.org/browser/echo-knowledge-base/tags/17.214.0/includes/admin/editor/class-epkb-frontend-editor.php#L848"},{"url":"https://plugins.trac.wordpress.org/browser/echo-knowledge-base/tags/17.214.0/includes/admin/editor/class-epkb-frontend-editor.php#L1072"},{"url":"https://plugins.trac.wordpress.org/browser/echo-knowledge-base/tags/17.214.0/includes/class-epkb-utilities.php#L836"},{"url":"https://plugins.trac.wordpress.org/browser/echo-knowledge-base/tags/17.214.0/includes/features/layouts/class-epkb-layouts-setup.php#L45"},{"url":"https://plugins.trac.wordpress.org/changeset/3727663/echo-knowledge-base/trunk/includes/admin/editor/class-epkb-frontend-editor.php"},{"url":"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"}],"tags":["cve.org"],"epss":0.00254,"epssPercentile":0.17007,"ingestedAt":"2026-10-28T08:07:15.089Z","slug":"CVE-2026-101935","body":"## Overview\n\nThe 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.\n\n## Affected\n\n- `echo_knowledge_base_documentation_faqs_chat_smart_search <= 17.214.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":34,"depthScoreParts":{"impact":33.6,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}