---
id: CVE-2026-78265
title: >-
  Unauthenticated PHP Object Injection in The Events Calendar <= 6.17.2
  versions.
summary: >-
  Unauthenticated PHP Object Injection in The Events Calendar <= 6.17.2
  versions.
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-502
published: '2026-08-24'
updated: '2026-10-12'
sourceUpdated: '2026-10-12T15:10:00.207'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-78265'
references:
  - url: >-
      https://patchstack.com/database/wordpress/plugin/the-events-calendar/vulnerability/wordpress-the-events-calendar-plugin-6-17-2-php-object-injection-vulnerability?_s_id=cve
    label: audit@patchstack.com
tags:
  - nvd
epss: 0.00564
epssPercentile: 0.45247
ingestedAt: '2026-10-12T15:55:08.139Z'
---

## Overview

Unauthenticated PHP Object Injection in The Events Calendar <= 6.17.2 versions.

## Remediation

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