Is CVE-2026-84740 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-84740?

CVE-2026-84740 has a CVSS v3 severity of MEDIUM (6.5).

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CVE-2026-84740

Description

The Events Calendar WordPress plugin before 6.17.5.1 does not validate or sanitise data submitted to an unauthenticated AJAX action before merging it into its rendering context, allowing unauthenticated users to execute arbitrary shortcodes registered on the site.