Vulnerabilities / Event Post / WPSEC-2026-0737
Event Post <= 6.1.1 - Authenticated (Subscriber+) Missing Authorization to Child Event Creation
Medium 4.3
CWE-862Fixed in 6.1.2
- ID
- WPSEC-2026-0737
- Plugin
- Event Post (event-post)
- Affected
- all versions before 6.1.2
- Remediation
- Update to 6.1.2 or later.
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- Weakness
- CWE-862
- Usage
- Plugin Low · Affected versions None seen among sites WPSec scans, 2026-10-10
- Attack surface
- Event Post on WPSec AttackSurface
- Fix released
- Published
Description
The Event Post plugin for WordPress is vulnerable to unauthorized modification of data via the EventPostAddChild AJAX and admin-post actions in all versions up to, and including, 6.1.1, due to a missing capability check and missing nonce verification in the add_child_ajax function, and a missing edit_post check in the add_child_admin_post function. This makes it possible for authenticated attackers, with subscriber-level access and above, to create published child events attached to arbitrary posts they are not allowed to edit when the child events feature is enabled.
References
- https://wpsec.com/vuln/WPSEC-2026-0737/
- https://plugins.svn.wordpress.org/event-post/tags/6.1.2/
- https://wordpress.org/plugins/event-post/
Published by WPSec. Provided as is, without warranty. Corrections: contact us.
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