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CVE-2026-15984

HIGH 7.2 CVSS 3.1
Published
September 5, 2026
Last modified
September 8, 2026
NVD status
Deferred
Reported by
security@wordfence.com
Weakness
CWE-79
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Description

The QuickCal plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Custom Field Parameters in all versions up to, and including, 1.0.20 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. The nonce guarding the unauthenticated booked_add_appt AJAX action is publicly embedded on any page rendering the booking calendar shortcode, making it trivially obtainable by unauthenticated attackers without any prior account or privilege.

Affected products and versions

  • Themovation QuickCal — Up to and including 1.0.20

References

  • codecanyon.net https://codecanyon.net/item/quickcal-appointment-booking-calendar-for-wordpress/47981746
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/9bfcfc13-ccfb-4319-99a7-7d7510a11cfe?source=cve
  • nvd.nist.gov Official NVD record