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Vulnerability record · CVE-2026-13441 · published 9 July 2026

CVE-2026-13441: Cross-site scripting vulnerability

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.

7.2 CVSS 3.1 High EPSS 0.43% · top 65.4% CWE-79 · Cross-site scripting Deferred
7.2CVSS 3.1 base score
0.43%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
8References
9 Jul 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

References

LinkTags
https://plugins.trac.wordpress.org/browser/eventprime-event-calendar-management/tags/4.3.4.2/admin/class-eventprime-even
https://plugins.trac.wordpress.org/browser/eventprime-event-calendar-management/tags/4.3.4.2/includes/class-ep-ajax.php#
https://plugins.trac.wordpress.org/browser/eventprime-event-calendar-management/tags/4.3.4.2/includes/class-eventprime-f
https://plugins.trac.wordpress.org/browser/eventprime-event-calendar-management/trunk/admin/class-eventprime-event-calen
https://plugins.trac.wordpress.org/browser/eventprime-event-calendar-management/trunk/includes/class-ep-ajax.php#L1200
https://plugins.trac.wordpress.org/browser/eventprime-event-calendar-management/trunk/includes/class-eventprime-function
https://plugins.trac.wordpress.org/changeset?reponame=&old=3595157%40eventprime-event-calendar-management&new=3595157%40
https://www.wordfence.com/threat-intel/vulnerabilities/id/2abd400b-c633-4b38-ad3e-c9ce602ff07f?source=cve

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Source: NIST National Vulnerability Database (record CVE-2026-13441), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.