CVE-2026-6810 MEDIUM

CVE-2026-6810: Booking Calendar Contact Form <= 1.2.63 - Authenticated (Subscriber+) Insecure Direct Object Reference to Calendar Takeover

Vendor Codepeople
Product Booking Calendar Contact Form
Weakness CWE-639 · IDOR
Published April 24, 2026
Last update April 24, 2026
View on NVD All CVEs

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

What the vulnerability does

01Description

The Booking Calendar Contact Form plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 1.2.63 via the dex_bccf_admin_int_calendar_list.inc.php file due to missing validation on a user controlled key. This makes it possible for authenticated attackers, with Subscriber-level access and above, to takeover other user's calendars and view user data associated with the calendar.

Explanation of Vulnerability in Simple Terms

02Summary

Booking Calendar Contact Form versions 1.2.63 and earlier contain an integrity vulnerability that allows unauthenticated attackers to modify data via the network. The vulnerability requires no user interaction and affects the integrity of stored information. Site administrators should update to a version newer than 1.2.63 to remediate this issue.

What an attacker can do

03Attacker Capabilities

Modify data on the site without authentication.

Potential impact on your site

04Site Impact

Attackers can alter booking calendar or form data without logging in, potentially corrupting records.

Conditions required to exploit

05Prerequisites

Network access only; no authentication or user interaction required.

Key dates

06Disclosure timeline

April 24, 2026 CVE published
April 24, 2026 Record updated