XSS in Codepeople Appointment Hour Booking – Calendar
CVE-2026-96573
The Appointment Hour Booking – Booking Calendar plugin for WordPress is vulnerable to Stored DOM-Based Cross-Site Scripting via Booking Form Single-Line Field via Schedule Calendar List Renderer in all versions up to, and including, 1.5.97 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires the 'list_readmore_numberofwords' Other Parameters setting to be configured with a positive integer value; the default value of 0 bypasses the decode-and-truncate branch entirely and is not exploitable through this sink.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- www.wordfence.com/threat-intel/vulnerabilities/id/3044e60f-b930-42db-ba5d-656e7…
- plugins.trac.wordpress.org/browser/appointment-hour-booking/tags/1.5.97/mv/js/j…
- plugins.trac.wordpress.org/browser/appointment-hour-booking/tags/1.5.97/cp-main…
- plugins.trac.wordpress.org/browser/appointment-hour-booking/tags/1.5.97/cp-main…
- plugins.trac.wordpress.org/browser/appointment-hour-booking/tags/1.5.97/cp-main…
- plugins.trac.wordpress.org/browser/appointment-hour-booking/tags/1.5.97/classes…
- plugins.trac.wordpress.org/changeset
Frequently asked questions
- What is CVE-2026-96573?
- CVE-2026-96573 is a high-severity vulnerability in Codepeople Appointment Hour Booking – Calendar, classified under Cross-site Scripting. CVSS score: 7.2/10. Published 2026-10-01.
- How severe is CVE-2026-96573?
- High severity. CVSS v3 base score is 7.2 out of 10.