CVE-2026-1856
Appointment Booking Calendar <= 1.4.4 - Authenticated (Author+) Stored Cross-Site Scripting via Custom Booking Field Label
- State
- Published
- Severity
- 6.4 Medium
- Published
- Jun 19, 2026
- Updated
- Jun 22, 2026
- Reserved
- Feb 3, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.4 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N | Wordfence |
Weaknesses
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Products
| Product | Versions |
|---|---|
Creavi Appointment Booking Calendarcreavi |
|
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/2618ccde-2bb0-4cd4-b415-68a671507709?source=cve
- https://plugins.trac.wordpress.org/browser/creavi-booking-service/trunk/assets/js/booking.js#L379
- https://plugins.trac.wordpress.org/browser/creavi-booking-service/tags/1.1.0/assets/js/booking.js#L379
- https://plugins.trac.wordpress.org/changeset/3564451/creavi-booking-service
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