What is CVE-2026-97257?

CVE-2026-97257 is a high-severity vulnerability in Presstigers Simple Event Planner, classified under Deserialization of Untrusted Data. CVSS score: 8.8/10. Published 2026-10-05.

How severe is CVE-2026-97257?

High severity. CVSS v3 base score is 8.8 out of 10.

Deserialization in Presstigers Simple Event Planner

CVE-2026-97257

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.

Vulnerability class: Insecure Deserialization

Published 2026-10-05 · last modified 2026-10-06.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Presstigers Simple Event Planner

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

patchstack.com/database/wordpress/plugin/simple-event-planner/vulnerability/wor… (vdb-entry)

Frequently asked questions

What is CVE-2026-97257?: CVE-2026-97257 is a high-severity vulnerability in Presstigers Simple Event Planner, classified under Deserialization of Untrusted Data. CVSS score: 8.8/10. Published 2026-10-05.
How severe is CVE-2026-97257?: High severity. CVSS v3 base score is 8.8 out of 10.