CVE-2026-1856
MediumCVSS 6.4Exploitation Probability (EPSS)
Low risk9th percentile — higher than 9% of all known CVEs
Summary
The Appointment Booking Calendar plugin for WordPress is vulnerable to Stored Cross-Site Scripting (XSS) via custom booking field labels in all versions up to and including 1.4.4 due to insufficient input sanitization and output escaping.
Risk Assessment
Authenticated attackers with Author-level access and above can inject arbitrary web scripts that will execute whenever a user accesses an injected page, potentially leading to data theft or account takeover.
Recommendation
It is recommended to update the plugin to the latest version to mitigate this vulnerability and implement additional security measures such as monitoring user activity.
Original NVD description (English source)
The Appointment Booking Calendar plugin for WordPress is vulnerable to Stored Cross-Site Scripting via custom booking field labels in all versions up to, and including, 1.4.4 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.