What is CVE-2026-86475?

CVE-2026-86475 is a medium-severity vulnerability in Appointment Hour Booking, classified under Improper Input Validation. CVSS score: 5.3/10. Published 2026-09-16.

How severe is CVE-2026-86475?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Improper input validation in Appointment Hour Booking

CVE-2026-86475

The Appointment Hour Booking WordPress plugin before 1.5.95 does not check every appointment in a booking submission against the capacity configured for its own slot, allowing unauthenticated visitors to take slots that are already fully booked.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

Affected products

Unknown Appointment Hour Booking

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

contact@wpscan.com (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-86475?: CVE-2026-86475 is a medium-severity vulnerability in Appointment Hour Booking, classified under Improper Input Validation. CVSS score: 5.3/10. Published 2026-09-16.
How severe is CVE-2026-86475?: Medium severity. CVSS v3 base score is 5.3 out of 10.