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CVE-2026-8143

HIGH 7.2 CVSS 3.1
Published
May 27, 2026
Last modified
June 17, 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 HBook plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'hb_country_iso', 'hb_usa_state_iso', and 'hb_canada_province_iso' parameters in all versions up to, and including, 2.1.6 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 HBook Customers admin page).

Affected products and versions

  • omnivo Booking Calendar – Event Calendar — Up to and including 2.1.6

References

  • codecanyon.net https://codecanyon.net/item/hbook-hotel-booking-system-wordpress-plugin/15059946
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/e1c16bcb-c188-4e01-9d0b-e4e1a1ef82ee?source=cve
  • nvd.nist.gov Official NVD record