Insecure Direct Object Reference in Booking Calendar Plugin for WordPress
CVE-2026-2230

4.3MEDIUM

Key Information:

Vendor

WordPress
Status
Booking Calendar
Vendor
CVE Published:
18 February 2026

What is CVE-2026-2230?

The Booking Calendar plugin for WordPress presents a vulnerability due to Insecure Direct Object Reference, affecting all versions up to and including 10.14.14. This flaw arises from insufficient validation on user-controlled keys within the handle_ajax_save function. As a result, authenticated users with Subscriber-level access, who have been granted booking permissions by an Administrator, can manipulate other users' plugin settings. This exploitation can lead to unauthorized alterations of the booking calendar display options, potentially disrupting the booking functionality for affected users.

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Affected Version(s)

Booking Calendar * <= 10.14.14

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/browser/booking/trunk/...
https://plugins.trac.wordpress.org/changeset/3456856/

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

TarcĂ­sio Luchesi De Almeida Silva
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