Unrated severityNVD Advisory· Published Jun 19, 2026
Appointment Booking Calendar <= 1.4.4 - Authenticated (Author+) Stored Cross-Site Scripting via Custom Booking Field Label
CVE-2026-1856
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
2<=1.4.4+ 1 more
- (no CPE)range: <=1.4.4
- (no CPE)range: <=1.4.4
Patches
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
4- plugins.trac.wordpress.org/browser/creavi-booking-service/tags/1.1.0/assets/js/booking.jsmitre
- plugins.trac.wordpress.org/browser/creavi-booking-service/trunk/assets/js/booking.jsmitre
- plugins.trac.wordpress.org/changeset/3564451/creavi-booking-servicemitre
- www.wordfence.com/threat-intel/vulnerabilities/id/2618ccde-2bb0-4cd4-b415-68a671507709mitre
News mentions
1- 25 WordPress Plugin CVEs Drop in Two Days: Critical File Deletion, SSRF, and XSS Lead the BatchVypr Intelligence · Jun 19, 2026