---
id: CVE-2026-84740
title: >-
  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 shortco…
summary: >-
  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 shortco…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'
cwe:
  - CWE-74
product: The Events Calendar
affected:
  - the_events_calendar >= 6.12.0 < 6.17.5.1
published: '2026-10-02'
updated: '2026-10-02'
sourceUpdated: '2026-10-02T11:17:35.207'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-84740'
references:
  - url: 'https://wpscan.com/vulnerability/3381a51e-beaa-4420-a33b-6a68612a2e8a/'
    label: contact@wpscan.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-02T10:48:35.502404Z'
ingestedAt: '2026-10-02T07:13:06.670Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.