Advanced Country Blocker <= 2.3.1 - Unauthenticated Authorization Bypass via Insecure Default Secret Key

Initialization of a Resource with an Insecure Default
CVE CVE-2026-1675
CVSS Medium (5.3)
Publicly Published February 6, 2026
Last Updated February 12, 2026
Researcher Hector Flores
Description

The Advanced Country Blocker plugin for WordPress is vulnerable to Authorization Bypass in all versions up to, and including, 2.3.1 due to the use of a predictable default value for the secret bypass key created during installation without requiring users to change it. This makes it possible for unauthenticated attackers to bypass the geolocation blocking mechanism by appending the key to any URL on sites where the administrator has not changed the default value.

References

1 affected software package

Software Type Plugin
Software Slug advanced-country-blocker (view on wordpress.org)
Patched? Yes
Affected Version
  • <= 2.3.1
Patched Version
  • 2.3.2
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