CVE-2026-103366 latepoint CVE debrief

Who should care

Defenders responsible for WordPress installations with the Appointment Booking Plugin – LatePoint | Calendar & Scheduling for WordPress plugin should assess exposure and prioritize remediation.

Why it matters

CVE-2026-103366 allows unauthenticated attackers to access sensitive information, including appointment details and pending checkout contents, due to an Insecure Direct Object Reference vulnerability in the Appointment Booking Plugin – LatePoint | Calendar & Scheduling for WordPress plugin.

• Unauthenticated attackers can enumerate sequential booking / cart identifiers
• Read other customers' appointment details (service name, agent, date/time, duration, price breakdown, status)
• Read other shoppers' pending checkout contents directly from the JSON responses

Technical summary

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.

Defensive priority

Defenders should prioritize verifying the vulnerability in their inventory and applying the vendor's remediation.

Recommended defensive actions

• Verify the Appointment Booking Plugin – LatePoint | Calendar & Scheduling for WordPress version and apply a patch if necessary
• Restrict access to sensitive routes and validate user input
• Monitor for suspicious activity and implement additional security measures
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The vulnerability allows 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.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.