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CVE-2026-14545 – Authentication Bypass / Account Takeover – TrueBooker WordPress Plugin (before 1…

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Summary

CVE-2026-14545 is a critical authentication bypass and account takeover vulnerability in the TrueBooker – Appointment Booking and Scheduler System WordPress plugin affecting all versions before 1.2.4. The flaw allows an unauthenticated remote attacker to reset the password of any WordPress account — including site administrators — by exploiting a front-end account handler that performs no account ownership validation, leading to full site takeover. The vulnerability carries a CVSS v3.1 base score of 9.8 (Critical).

Technical details

  • Root cause: The plugin’s front-end account handler responsible for password resets does not validate that the requesting party owns the target account, classified under CWE-269 (Improper Privilege Management). The version 1.2.4 changelog explicitly confirms the fix as "Improved authorization checks" and "Improved password reset validation."
  • Trigger conditions: No authentication, no user interaction, and no special configuration are required. The attack can be initiated remotely over the network against any reachable WordPress installation running the vulnerable plugin.
  • Attack vector: Network-accessible front-end account handler endpoint exposed by the TrueBooker plugin on the WordPress site. An attacker submits a crafted password-reset request targeting an arbitrary user — including the administrator account — without possessing the account credentials or any session token.
  • Impact: Successful exploitation grants the attacker full control over the targeted WordPress account. If an administrator account is targeted, this results in complete site compromise — including access to all stored data, the ability to install malicious plugins or backdoors, and lateral movement within any connected infrastructure. The SSVC assessment published in the CVE record rates technical impact as Total and exploitation as automatable.

Affected software

  • TrueBooker – Appointment Booking and Scheduler System, all versions before 1.2.4

Severity

  • CVSS v3.1 Base Score: 9.8 (Critical)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Mitigation and recommended actions

  • Immediate: Update the TrueBooker plugin to version 1.2.4 or later (current release is 1.2.6). The 1.2.4 release changelog confirms: "Fixed multiple security vulnerabilities," "Improved authorization checks," and "Improved password reset validation."
  • If immediate patching is not possible: Consider temporarily disabling the TrueBooker plugin until the update can be applied, and restrict public access to WordPress front-end account management endpoints at the web server or WAF level to reduce the attack surface.

IONIX Status

The IONIX research team is tracking ongoing exploitation attempts and recommends immediate patching. Potentially affected assets are outlined in this post.

References

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