{"id":"CVE-2026-101935","state":"PUBLISHED","title":"Echo Knowledge Base <= 17.214.0 - Reflected Cross-Site Scripting via 'new_kb_config' Parameter","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.","publishedAt":"2026-10-28T07:48:29.075Z","updatedAt":"2026-10-29T01:41:50.091Z","severity":{"score":6.1,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","source":"Wordfence"},"assigner":"Wordfence","products":["echoplugins Echo Knowledge Base – Documentation, FAQs, Chat & Smart Search"],"affected":[{"vendor":"echoplugins","product":"Echo Knowledge Base – Documentation, FAQs, Chat & Smart Search","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"17.214.0","versionType":"semver"}]}],"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"],"weaknesses":["CWE-79"],"ingestedAt":"2026-10-29T20:10:13.529Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/101xxx/CVE-2026-101935.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-101935","state":"PUBLISHED","datePublished":"2026-10-28T07:48:29.075Z","dateUpdated":"2026-10-29T01:41:50.091Z","assignerShortName":"Wordfence","assignerOrgId":"b15e7b5b-3da4-40ae-a43c-f7aa60e62599","dateReserved":"2026-09-28T16:19:29.027Z"},"containers":{"cna":{"title":"Echo Knowledge Base <= 17.214.0 - Reflected Cross-Site Scripting via 'new_kb_config' Parameter","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"echoplugins","product":"Echo Knowledge Base – Documentation, FAQs, Chat & Smart Search","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"17.214.0","versionType":"semver"}]}],"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"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","baseScore":6.1,"baseSeverity":"MEDIUM"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-79","lang":"en","description":"CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","type":"CWE"}]}],"providerMetadata":{"shortName":"Wordfence","orgId":"b15e7b5b-3da4-40ae-a43c-f7aa60e62599","dateUpdated":"2026-10-28T07:48:29.075Z"},"credits":[{"lang":"en","type":"finder","value":"crow"}],"timeline":[{"time":"2026-10-25T17:07:53.000Z","lang":"en","value":"Vendor Notified"},{"time":"2026-10-27T18:45:20.000Z","lang":"en","value":"Disclosed"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-101935","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-10-29T01:28:44.586449Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-29T01:41:50.091Z"}}]}}}