PT-2026-5060 · WordPress · Appointment Hour Booking – Booking Calendar

Azhar Lockwood · Published 2026-01-28 · Updated 2026-01-28 · CVE-2026-1083

Positive Technologies (AI Summary)

CVSS v3.1

4.4

Medium

Base vector

AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions Appointment Hour Booking – Booking Calendar plugin for WordPress versions prior to 1.5.61

Description The Appointment Hour Booking – Booking Calendar plugin for WordPress is susceptible to Stored Cross-Site Scripting through form field configuration parameters. Insufficient input sanitization and output escaping on the ‘Min length/characters’ and ‘Max length/characters’ field configuration values allow authenticated attackers with administrator-level access or higher to inject arbitrary web scripts. These scripts execute when users access the form builder interface. This issue specifically impacts multi-site installations and those where unfiltered html has been disabled.

Recommendations Update to version 1.5.61 or later.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-1083

Affected Products

Appointment Hour Booking – Booking Calendar

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2026-1083 · Security Note
• https://t.me/cveNotify/150079 · Telegram Post
• https://twitter.com/CVEnew/status/2016388927519695314 · Twitter Post
• https://twitter.com/VulmonFeeds/status/2016404727160807887 · Twitter Post
• https://wordfence.com/threat-intel/vulnerabilities/id/a5cb1fea-134f-4c81-8f2f-76ee42df7f77?source=cve · Note
• https://plugins.trac.wordpress.org/browser/appointment-hour-booking/trunk/js/fields-admin/01_fbuilder.ftext.js#L64 · Note
• https://plugins.trac.wordpress.org/browser/appointment-hour-booking/tags/1.5.57/js/fields-admin/01_fbuilder.ftext.js#L64 · Note
• https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3442650%40appointment-hour-booking&new=3442650%40appointment-hour-booking&sfp_email=&sfph_mail= · Note