CVE-2026-183159.8CriticalCWE-639

CVE-2026-18315: TrueBooker <= 1.2.6 - Unauthenticated Authorization Bypass Through User-Controlled Key to Account Takeover to 'truebooker_wp_user_id' Parameter

themetechmount · TrueBooker – Appointment Booking and Scheduler System

Affected: themetechmount TrueBooker – Appointment Booking and Scheduler System · Exploitation: check available, not yet exploited

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

3.0%probability of exploitation in the next 30 days

87th percentile

050100

Higher than 87% of scored CVEs

9.8CriticalCVSS 3.1

LowMediumHighCrit.

DescriptionCVE.org

The TrueBooker – Appointment Booking and Scheduler System plugin for WordPress is vulnerable to Authorization Bypass Through User-Controlled Key leading to Account Takeover in all versions up to, and including, 1.2.6. This is due to the admin_user_create_cus AJAX handler lacking any authentication or capability check before passing the attacker-supplied truebooker_wp_user_id parameter directly to wp_update_user. This makes it possible for unauthenticated attackers to overwrite the email address of any WordPress user — including an administrator — and then complete the standard WordPress lost-password flow to fully take over the targeted account.

Affected products1

From the CVE record. A product or version that is not listed is unknown, not unaffected.

themetechmount · TrueBooker – Appointment Booking and Scheduler Systemup to and including 1.2.6

On the Atlas

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Open the Atlas

Exploitation: Check available, not yet exploited. A public nuclei template can confirm it on a system you are authorised to test.
CISA KEV: Not listed
Public check: TrueBooker <= 1.2.6 - Unauthenticated Authorization Bypass · nuclei template in projectdiscovery/nuclei-templates
Weakness: Insecure Direct Object Reference
Vendor: themetechmount
Published: August 2026
Band: Check available, not yet exploited, August 2026

CoverageNo articles yet

No CyberSIXT article names CVE-2026-18315 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.