CVE-2026-15667

The Eventin – Event Calendar, Event Registration, Tickets & Booking (AI Powered) plugin for WordPress, in all versions up to and including 4.1.22, is vulnerable to a Local File Inclusion (CWE-98) via the 'event_layout' parameter. Any authenticated user with contributor-level access or above can trigger the flaw through the REST API, because the default 'etn_manage_event' capability is assigned to Contributors and allows setting a malicious 'event_layout' value. Successful exploitation causes the server to include and execute arbitrary local .php files, letting the attacker run any PHP code in those files, which can bypass access controls or expose sensitive data, and can lead to full code execution where .php uploads can be made and included. Any WordPress site running Eventin 4.1.22 or earlier that has contributor-level or higher user accounts is affected. There is no known public proof-of-concept, the flaw is not in the CISA KEV catalog, and current exploitation appears unlikely (EPSS ~0.6% over 30 days).

What to do: Update Eventin to the latest patched release (any version newer than 4.1.22) as soon as one is available. Until patched, audit sites for contributor-level or higher accounts that could set 'event_layout' values via the REST API, consider revoking the 'etn_manage_event' capability from Contributors as an interim mitigation, and check whether any .php file uploads exist on the server that could be included for full code execution.