Information disclosure in Truebooker

CVE-2026-18778

The TrueBooker WordPress plugin before 1.2.7 does not have proper authorisation checks in some of its AJAX actions, allowing unauthenticated users to retrieve the personal information of customers who booked an appointment, including their name, email address, phone number and postal address.

Vulnerability class: Information Disclosure

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:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.003 (25.7th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 26th percentile — 25.7% 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-2026-18778: held from 0.003 to 0.003.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.001

Affected products

  • Truebooker

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-18778?
CVE-2026-18778 is a medium-severity vulnerability in Truebooker, classified under Information Disclosure. CVSS score: 5.3/10. Published 2026-08-19.
How severe is CVE-2026-18778?
Medium severity. CVSS v3 base score is 5.3 out of 10.