CVE-2026-93655
MediumCVSS 6.1Exploitation Probability (EPSS)
Low risk12th percentile - higher than 12% of all known CVEs
Summary
The Booking Calendar plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'wpbc_auto_fill' parameter in all versions up to and including 11.8.3 due to insufficient input sanitization and output escaping. Unauthenticated attackers can inject arbitrary web scripts into pages that execute if they can trick a user into performing an action such as clicking a link.
Risk Assessment
An attacker can execute malicious scripts in the user's browser, potentially stealing session data or performing actions on behalf of the user.
Recommendation
Update the Booking Calendar plugin to a version later than 11.8.3 to fix the XSS vulnerability.
Other vulnerabilities in Booking Calendar
See all- CVE-2026-92619High
The Booking Calendar plugin for WordPress is vulnerable to Privilege Escalation in all versions up to and including 11.8.2 via the wpbc_ajax_option_save AJAX action. An authenticated attacker with Editor-level access can write WordPress options such as default_role=administrator and create an administrator account.
- CVE-2026-92561Medium
The Booking Calendar plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'options' parameter in all versions up to and including 11.8.2 due to insufficient input sanitization and output escaping. Unauthenticated attackers can inject arbitrary web scripts that execute if they can trick a user into clicking a link. The nonce check is bypassed by default because the 'booking_is_nonce_at_front_end' option ships disabled.
- CVE-2026-74002Medium
Unauthenticated Broken Access Control vulnerability in Booking Calendar plugin up to version 11.7. Unauthenticated users can access booking and management functions that should be restricted.
- CVE-2026-59558High
Unauthenticated Cross-Site Scripting (XSS) vulnerability in the Booking Calendar plugin up to version 11.4.2. Allows an attacker to inject malicious scripts into the page.
Original NVD description (English source)
The Booking Calendar plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'wpbc_auto_fill' parameter in all versions up to, and including, 11.8.3 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS