{"id":"CVE-2026-110721","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-110721","generatedAt":"2026-10-28T07:40:58.651Z","title":"The NotificationX plugin for WordPress is vulnerable to Missing Authorization leading to arbitrary content injection in versions up to, and including, 3.3.3 The /notificationx/v1/popup-submit REST route is registered with permission_callback =>…","description":"The NotificationX plugin for WordPress is vulnerable to Missing Authorization leading to arbitrary content injection in versions up to, and including, 3.3.3 The /notificationx/v1/popup-submit REST route is registered with permission_callback => '__return_true', and the handler at PopupNotification::handle_popup_submission() accepts an attacker-controlled nx_id, loads whichever NotificationX campaign that id points to, and copies that campaign's own source into the new entry without verifying that the campaign is a Popup Notification or Exit Intent Popup (the two sources this form is intended to serve). This makes it possible for unauthenticated attackers to inject forged social-proof entries (name, title, message, email, theme) into any enabled non-popup NotificationX campaign — WP Comments, WooCommerce/EDD/Give sales, reviews, etc.","published":"2026-10-16T05:17:30.000Z","lastModified":"2026-10-16T15:17:12.000Z","status":"Deferred","sourceIdentifier":"security@wordfence.com","cvss":{"version":"3.1","score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"},"cwe":["CWE-862"],"affected":[],"epss":{"score":0.00245,"percentile":0.15642,"date":"2026-10-27","history":[{"date":"2026-10-16","score":0.00245,"percentile":0.14651}]},"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 (0.24%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-16T05:17:30.000Z","detail":{"score":"5.3","severity":"MEDIUM","publishedAt":"2026-10-16T05:17:30.097Z"},"summary":"New CVE, medium severity (CVSS 5.3)."}],"references":[{"url":"https://plugins.trac.wordpress.org/browser/notificationx/tags/3.3.3/includes/Admin/Entries.php#L93","source":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/notificationx/tags/3.3.3/includes/Core/Rest/Popup.php#L186","source":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/notificationx/tags/3.3.3/includes/Core/Rest/Popup.php#L58","source":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/notificationx/tags/3.3.3/includes/Extensions/Extension.php#L668","source":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/browser/notificationx/tags/3.3.3/includes/Extensions/PopupNotification/PopupNotification.php#L1161","source":"security@wordfence.com"},{"url":"https://plugins.trac.wordpress.org/changeset/3746251/notificationx/trunk/includes/Extensions/PopupNotification/PopupNotification.php","source":"security@wordfence.com"},{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/84b5e044-4522-480a-ad14-8886ed691a86?source=cve","source":"security@wordfence.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-110721","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."}