What is CVE-2026-39663?

CVE-2026-39663 is a medium-severity vulnerability in Themetechmount Truebooker, classified under Missing Authorization. CVSS score: 5.3/10. Published 2026-04-08.

How severe is CVE-2026-39663?

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

Auth bypass in Themetechmount Truebooker

CVE-2026-39663

Missing Authorization vulnerability in themetechmount TrueBooker truebooker-appointment-booking allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects TrueBooker: from n/a through <= 1.1.5.

Vulnerability class: Broken Access Control

EPSS: 0.000 (12.4th percentile) — read the EPSS interpretation.

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

Themetechmount Truebooker — versions 0

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

patchstack.com/database/Wordpress/Plugin/truebooker-appointment-booking/vulnera… (vdb-entry)

Frequently asked questions

What is CVE-2026-39663?: CVE-2026-39663 is a medium-severity vulnerability in Themetechmount Truebooker, classified under Missing Authorization. CVSS score: 5.3/10. Published 2026-04-08.
How severe is CVE-2026-39663?: Medium severity. CVSS v3 base score is 5.3 out of 10.