CVE-2026-18315: CWE-639 Authorization Bypass Through User-Controlled Key in themetechmount TrueBooker – Appointment Booking and Scheduler System
Description
The TrueBooker Appointment Booking and Scheduler System WordPress plugin is vulnerable to an authorization bypass vulnerability in all versions up to and including 1.2.6. The flaw allows unauthenticated attackers to overwrite the email address of any WordPress user, including administrators, by exploiting an AJAX handler that lacks proper authentication and capability checks. This can lead to full account takeover via the standard WordPress password reset process.
CVSS v3.1
Score 9.8critical
Affected software
themetechmount
TrueBooker – Appointment Booking and Scheduler System
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-18315 describes an authorization bypass vulnerability in the TrueBooker plugin for WordPress (versions up to 1.2.6). The vulnerability arises because the admin_user_create_cus AJAX handler does not perform authentication or capability checks before accepting a user-controlled parameter (truebooker_wp_user_id) that is passed directly to wp_update_user. This allows unauthenticated attackers to modify the email address of any WordPress user, including administrators, enabling them to complete the password reset flow and take over the targeted account.
Potential Impact
An unauthenticated attacker can overwrite the email address of any WordPress user, including administrators, leading to complete account takeover. This compromises confidentiality, integrity, and availability of the affected WordPress site, as attackers gain full control over user accounts.
Mitigation Recommendations
No patch information is provided in the input data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to the vulnerable AJAX handler or disable the plugin if possible to prevent exploitation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-07-29T18:10:29.569Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a85fb7bacd9273b497a320f
Added to database: 08/19/2026, 18:52:43 UTC
Last enriched: 09/11/2026, 07:02:19 UTC
Last updated: 10/04/2026, 10:02:26 UTC
Views: 51
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