Unauthenticated Cross Site Scripting Vulnerability in Booking Calendar by WordPress
CVE-2026-59558

7.1HIGH

Key Information:

Vendor

WordPress
Status
Booking Calendar
Vendor
CVE Published:
27 July 2026

What is CVE-2026-59558?

The Booking Calendar plugin for WordPress, reaching versions up to 11.4.2, is susceptible to an unauthenticated Cross Site Scripting (XSS) vulnerability. This flaw allows attackers to execute arbitrary JavaScript in the context of a user's browser without any authentication. As a result, it can potentially lead to data theft, session hijacking, or redirecting users to malicious websites. It is crucial for WordPress site administrators using this plugin to update to a secure version to mitigate the associated risks.

Affected Version(s)

Booking Calendar <= 11.4.2

References

https://patchstack.com/database/wordpress/plugin/booking/...
vdb-entry

CVSS V3.1

Score:
7.1
Severity:
HIGH
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

daroo | Patchstack Bug Bounty Program
.