Auth bypass in Appointment Hour Booking

CVE-2026-16282

The Appointment Hour Booking WordPress plugin before 1.5.88 does not validate a client-supplied booking price against the server-side configured service price, allowing unauthenticated users to submit an arbitrary final price (including zero or negative) that is stored as the authoritative booking price, corrupting booking and payment records.

Vulnerability class: Broken Authentication

Published · last modified .

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.

EPSS exploit prediction

EPSS: 0.003 (23.2th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 23.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-16282: held from 0.003 to 0.003.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

  • Appointment Hour Booking — versions 0

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-16282?
CVE-2026-16282 is a medium-severity vulnerability in Appointment Hour Booking, classified under Improper Authentication. CVSS score: 5.3/10. Published 2026-08-08.
How severe is CVE-2026-16282?
Medium severity. CVSS v3 base score is 5.3 out of 10.