# CVE-2026-93399: Bookly Insecure Direct Object Reference in AJAX handlers

Source: https://junglewise.ai/threats/cve-2026-93399-the-bookly-plugin-for-wordpress-is-vulnerable-to-insecure-direct  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-25. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-93399 · Severity: critical · CVSS 9.1 · Published 2026-09-25

Bookly is a WordPress plugin that manages appointment bookings and scheduling. The plugin's AJAX handlers are vulnerable to insecure direct object reference, allowing unauthenticated attackers to view other customers' booking details, retrieve sensitive order tokens, and delete arbitrary bookings without authorization. This could lead to privacy violations, appointment disruption, and potential fraud by attackers accessing confidential customer information.

Technologies: [Bookly](https://junglewise.ai/threats/technologies/bookly). Vendors: [Bookly](https://junglewise.ai/threats/vendors/bookly).

## Quick answers

**Is CVE-2026-93399 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-93399 being exploited in the wild.

**How severe is CVE-2026-93399?** Critical severity, with a CVSS score of 9.1, published 25 September 2026.

**Which products and versions are affected?** Bookly up to and including 28.2.

**Is there a fix for CVE-2026-93399?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-93399 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-93399?** Check whether you run Bookly at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability exists in multiple AJAX handlers (bookly_get_form_id, bookly_render_complete, bookly_add_to_calendar, bookly_rollback_order) that trust attacker-controlled order_id parameters without verifying ownership or proper authorization. The bookly_get_form_id handler stores user-supplied order_id into a session, which bookly_render_complete then uses to retrieve order tokens without checking if the current session created that order. This allows unauthenticated attackers to enumerate order IDs and access sensitive booking information across customers.

## Affected products

- Bookly Bookly up to and including 28.2

## Timeline

- 2026-09-25: disclosed: CVE-2026-93399 published on NVD

## References

- [https://plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/28.2/frontend/modules/booking/Ajax.php](https://plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/28.2/frontend/modules/booking/Ajax.php)
- [https://plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/28.2/frontend/modules/booking/Ajax.php](https://plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/tags/28.2/frontend/modules/booking/Ajax.php)

## Related threats

- [Bookly plugin for WordPress PHP Object Injection](https://junglewise.ai/threats/cve-2026-12626-the-online-scheduling-and-appointment-booking-system-bookly)
- [Bookly broken access control in appointment booking](https://junglewise.ai/threats/cve-2026-96348-unauthenticated-broken-access-control-in-bookly-28-2-versions)
- [Bookly Insecure Direct Object References (IDOR) in Subscriber access](https://junglewise.ai/threats/cve-2026-96347-subscriber-insecure-direct-object-references-idor-in-bookly-28-2)
- [Bookly WordPress plugin payment bypass via booking price manipulation](https://junglewise.ai/threats/cve-2026-86838-the-bookly-wordpress-plugin-before-28-3-does-not-validate-client)
- [Bookly appointment booking plugin IDOR in AI assistant conversations](https://junglewise.ai/threats/cve-2026-91847-the-online-scheduling-and-appointment-booking-system-wordpress)