CVE-2026-40780 HIGH

CVE-2026-40780: WordPress BookIt plugin < 2.5.4.1 - Broken Authentication vulnerability

Vendor Liquid Web / Stellarwp

Product BookIt

Weakness CWE-288

Published June 2, 2026

Last update June 2, 2026

View on NVD All CVEs

CVSS base score

7.5/10

Attack vector Network

Attack complexity Low

Privileges required None

User interaction None

Confidentiality None

Integrity High

CVSS vector

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

What the vulnerability does

01Description

Authentication Bypass Using an Alternate Path or Channel vulnerability in Liquid Web / StellarWP BookIt allows Password Recovery Exploitation. This issue affects BookIt: from n/a before 2.5.4.1.

Explanation of Vulnerability in Simple Terms

02Summary

BookIt versions before 2.5.4.1 contain an authentication bypass vulnerability. An attacker can send a specially crafted network request to modify data or functionality without providing valid credentials. The vulnerability requires no user interaction and can be exploited remotely. Update to version 2.5.4.1 or later to resolve this issue.

What an attacker can do

03Attacker Capabilities

Modify or tamper with BookIt data and functionality without authentication.

Potential impact on your site

04Site Impact

Unauthorized users can alter booking data, settings, or other critical information in BookIt.

Conditions required to exploit

05Prerequisites

Network access to the BookIt application; no authentication or user interaction required.

Key dates

06Disclosure timeline

June 2, 2026 CVE published

June 2, 2026 Record updated

External resources

07References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2026-40780 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/288.html AskarLabs — CWE-288 write-up Authentication Bypass Using an Alternate Path or Channel

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