{"id":"CVE-2026-13441","aliases":["EUVD-2026-42559","GHSA-566f-2h7m-xrh3"],"status":"published","title":"EventPrime \u003c= 4.3.4.2 - Unauthenticated Stored Cross-Site Scripting via 'new_event_type_background_color' Parameter","description":"The EventPrime – Events Calendar, Bookings and Tickets plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'new_event_type_background_color' parameter in all versions up to, and including, 4.3.4.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with custom-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This requires the plugin's Guest Submissions setting (allow_submission_by_anonymous_user) to be enabled, which allows unauthenticated attackers to submit event types via the frontend form; when that setting is disabled, exploitation requires at minimum a subscriber-level authenticated account.","severity":{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00428,"percentile":0.37348,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2026-07-09T09:31:20Z","modified":"2026-07-09T16:19:45Z","products":[{"vendor":"metagauss","product":"eventprime – events calendar, bookings and tickets"}],"references":[{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/2abd400b-c633-4b38-ad3e-c9ce602ff07f?source=cve"},{"url":"https://plugins.trac.wordpress.org/browser/eventprime-event-calendar-management/tags/4.3.4.2/admin/class-eventprime-event-calendar-management-admin.php#L1973"},{"url":"https://plugins.trac.wordpress.org/browser/eventprime-event-calendar-management/tags/4.3.4.2/includes/class-ep-ajax.php#L1200"},{"url":"https://plugins.trac.wordpress.org/browser/eventprime-event-calendar-management/tags/4.3.4.2/includes/class-eventprime-functions.php#L9793"},{"url":"https://plugins.trac.wordpress.org/browser/eventprime-event-calendar-management/trunk/admin/class-eventprime-event-calendar-management-admin.php#L1973"},{"url":"https://plugins.trac.wordpress.org/browser/eventprime-event-calendar-management/trunk/includes/class-ep-ajax.php#L1200"},{"url":"https://plugins.trac.wordpress.org/browser/eventprime-event-calendar-management/trunk/includes/class-eventprime-functions.php#L9793"},{"url":"https://plugins.trac.wordpress.org/changeset?reponame=\u0026old=3595157%40eventprime-event-calendar-management\u0026new=3595157%40eventprime-event-calendar-management"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-13441"},{"url":"https://github.com/advisories/GHSA-566f-2h7m-xrh3"}],"sources":{"cve":[{"id":"CVE-2026-13441","title":"EventPrime \u003c= 4.3.4.2 - Unauthenticated Stored Cross-Site Scripting via 'new_event_type_background_color' Parameter","description":"The EventPrime – Events Calendar, Bookings and Tickets plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'new_event_type_background_color' parameter in all versions up to, and including, 4.3.4.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with custom-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This requires the plugin's Guest Submissions setting (allow_submission_by_anonymous_user) to be enabled, which allows unauthenticated attackers to submit event types via the frontend form; when that setting is disabled, exploitation requires at minimum a subscriber-level authenticated account.","status":"published","published":"2026-07-09T09:31:20.201Z","modified":"2026-07-09T12:19:37.188Z","cvss":[{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:19:49.885652Z"}],"euvd":[{"id":"EUVD-2026-42559","description":"The EventPrime – Events Calendar, Bookings and Tickets plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'new_event_type_background_color' parameter in all versions up to, and including, 4.3.4.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with custom-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This requires the plugin's Guest Submissions setting (allow_submission_by_anonymous_user) to be enabled, which allows unauthenticated attackers to submit event types via the frontend form; when that setting is disabled, exploitation requires at minimum a subscriber-level authenticated account.","status":"published","published":"2026-07-09T09:31:20Z","modified":"2026-07-09T12:19:37Z","cvss":[{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N","level":"high"}],"updated_at":"2026-11-02T18:20:04.895477Z"}],"ghsa":[{"id":"GHSA-566f-2h7m-xrh3","title":"The EventPrime – Events Calendar, Bookings and Tickets plugin for WordPress is vulnerable to...","description":"The EventPrime – Events Calendar, Bookings and Tickets plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'new_event_type_background_color' parameter in all versions up to, and including, 4.3.4.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with custom-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This requires the plugin's Guest Submissions setting (allow_submission_by_anonymous_user) to be enabled, which allows unauthenticated attackers to submit event types via the frontend form; when that setting is disabled, exploitation requires at minimum a subscriber-level authenticated account.","status":"published","published":"2026-07-09T12:30:27Z","modified":"2026-07-09T12:30:36Z","cvss":[{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N","level":"high"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:09:21.623271Z"}],"nvd":[{"id":"CVE-2026-13441","description":"The EventPrime – Events Calendar, Bookings and Tickets plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'new_event_type_background_color' parameter in all versions up to, and including, 4.3.4.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with custom-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This requires the plugin's Guest Submissions setting (allow_submission_by_anonymous_user) to be enabled, which allows unauthenticated attackers to submit event types via the frontend form; when that setting is disabled, exploitation requires at minimum a subscriber-level authenticated account.","status":"published","published":"2026-07-09T11:16:24.79Z","modified":"2026-07-09T16:19:45.567Z","cvss":[{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:12:28.4135Z"}]}}