CVE-2026-97257: Presstigers Simple Event Planner

High severity, CVSS 8.8. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• Presstigers Simple Event Planner: up to and including 1.5.7

Published 2026-10-05. Last modified 2026-10-06.