# Event Manager and Tickets Selling Plugin for WooCommerce <= 5.7.10 - Unauthenticated Arbitrary Shortcode Execution via Event Calendar Filter

- **ID:** WPSEC-2026-1733
- **Plugin:** Event Booking Manager for WooCommerce – Sell Tickets, Event Registration, RSVP & Event Calendar (`mage-eventpress`), https://wordpress.org/plugins/mage-eventpress/
- **Affected versions:** all versions before 5.7.11
- **Fixed in:** 5.7.11 (Update to 5.7.11 or later.)
- **Severity:** High 7.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)
- **Weakness:** CWE-94
- **Usage among sites WPSec scans:** plugin Medium, affected versions Low (as of 2026-10-27)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/mage-eventpress
- **Fix released:** 2026-10-26
- **Published:** 2026-10-27
- **URL:** https://wpsec.com/vuln/WPSEC-2026-1733/

## Description

The Event Booking Manager for WooCommerce plugin for WordPress is vulnerable to arbitrary shortcode execution via the mep_gat_event_calender AJAX action in all versions up to, and including, 5.7.10, due to user-supplied calendar filter values (cat, org, tag, city, country, status and year) being concatenated into a [mep-event-calendar] shortcode string that is passed to do_shortcode(). esc_attr() does not remove square brackets, and the only nonce the action checks is printed to every visitor on the plugin's front-end pages. This makes it possible for unauthenticated attackers to close the shortcode tag early and execute arbitrary shortcodes registered on the site.

## References

- https://wpsec.com/vuln/WPSEC-2026-1733/
- https://plugins.svn.wordpress.org/mage-eventpress/tags/5.7.11/
- https://wordpress.org/plugins/mage-eventpress/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-1733/

License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Free to use, share and adapt, also commercially, if you credit WPSec and link to this advisory.