# CP Multi View Event Calendar <= 1.4.41 - Missing Authorization to Authenticated (Contributor+) Calendar View Modification and Event Deletion

- **ID:** WPSEC-2026-0961
- **Plugin:** CP Multi View Events Calendar (`cp-multi-view-calendar`), https://wordpress.org/plugins/cp-multi-view-calendar/
- **Affected versions:** all versions before 1.4.42
- **Fixed in:** 1.4.42 (Update to 1.4.42 or later.)
- **Severity:** Medium 5.4 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L)
- **Weakness:** CWE-862
- **Usage among sites WPSec scans:** plugin Low, affected versions None seen (as of 2026-10-14)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/cp-multi-view-calendar
- **Fix released:** 2026-10-13
- **Published:** 2026-10-14
- **URL:** https://wpsec.com/vuln/WPSEC-2026-0961/

## Description

The CP Multi View Events Calendar plugin for WordPress is vulnerable to unauthorized modification and loss of data via the cp_multiviewadd_calendar, cp_multiviewdelete_calendar and cp_multiviewsaveautodel AJAX actions in all versions up to, and including, 1.4.41, due to a missing capability check on these functions, which rely only on a nonce that is shown to any user who can open the post editor. This makes it possible for authenticated attackers, with Contributor-level access and above, to create, modify and delete calendar views and to change the old-event auto-deletion settings of any calendar, which deletes past events.

## References

- https://wpsec.com/vuln/WPSEC-2026-0961/
- https://plugins.svn.wordpress.org/cp-multi-view-calendar/tags/1.4.42/
- https://wordpress.org/plugins/cp-multi-view-calendar/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-0961/

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.