---
id: CVE-2026-97257
title: >-
  Deserialization of Untrusted Data vulnerability in PressTigers Simple Event
  Planner simple-event-planner allows Object Injection.This issue affects Simple
  Event Planner: from n/a through 1.5.7.
summary: >-
  Deserialization of Untrusted Data vulnerability in PressTigers Simple Event
  Planner simple-event-planner allows Object Injection.This issue affects Simple
  Event Planner: from n/a through 1.5.7.
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-502
vendor: PressTigers
product: simple-event-planner
affected:
  - simple-event-planner <= 1.5.7
published: '2026-10-05'
updated: '2026-10-05'
sourceUpdated: '2026-10-05T20:17:29.447'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-97257'
references:
  - url: >-
      https://patchstack.com/database/wordpress/plugin/simple-event-planner/vulnerability/wordpress-simple-event-planner-plugin-1-5-7-php-object-injection-vulnerability?_s_id=cve
    label: audit@patchstack.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-05T19:31:00.001Z'
---

## Overview

Deserialization of Untrusted Data vulnerability in PressTigers Simple Event Planner simple-event-planner allows Object Injection.This issue affects Simple Event Planner: from n/a through 1.5.7.

## Remediation

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