VULNERABILITY INTELLIGENCE
CVE-2026-1856
CVSS score6.4 MEDIUM
EPSS probability0.33%
CISA KEVNot currently listed
Published2026-06-19
Last modified2026-06-22
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
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.
Weakness classification
- security@wordfence.com: CWE-79