CVE-2026-103366 — WordPress
HIGHCVE-2026-103366 is a high-severity (CVSS 7.5) CWE-639 vulnerability. No vendor fix is recorded yet; mitigation options are listed below.
The Appointment Booking Plugin – LatePoint | Calendar & Scheduling for WordPress plugin for WordPress is vulnerable to Insecure Direct Object Reference in versions up to, and including,…
Description
The Appointment Booking Plugin – LatePoint | Calendar & Scheduling for WordPress plugin for WordPress is vulnerable to Insecure Direct Object Reference in versions up to, and including, 5.7.3 via the booking[id] and cart[id] parameters on the steps__reload_booking_form_summary_panel and steps__start public routes (reachable through wp_ajax_nopriv_latepoint_route_call). This is due to OsStepsHelper::set_required_objects() feeding raw request parameters into set_booking_object() and set_cart_object(), which call OsModel::set_data() and load an arbitrary booking or cart row by primary key with no ownership check — the ownership guard the vendor added for the earlier disclosure lives only inside OsStepsHelper::load_step() and does not cover the sibling routes or cart[id] at all. This makes it possible for unauthenticated attackers to enumerate sequential booking / cart identifiers and read other customers' appointment details (service name, agent, date/time, duration, price breakdown, status) and other shoppers' pending checkout contents directly from the JSON responses.
Detection & mitigation playbook
VulnerabilityDetect
Identify every host running the affected component and compare the installed build against the fixed version below — for source-built or distro-packaged software the version string, not a lockfile, is the source of truth (`dpkg -l`, `rpm -q`, or the binary's own `--version`).
Remediation status
No fixed release is recorded for CVE-2026-103366 yet. Track the upstream advisory, and apply the exposure-reduction steps below in the meantime.
Mitigate without a patch
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
Frequently Asked Questions
Is CVE-2026-103366 in your dependencies?
Find it across , including transitive dependencies.