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OpenAdvisories
Medium · 5.3 CVE-2026-119039 EUVD-2026-124275GHSA-hx9j-f48g-rh4h

Defender Security 4.9.0 - 6.4.0 - Unauthenticated IP Address Spoofing via Smart IP Detection

Published Nov 12, 2026 · Updated Nov 12, 2026 · Assigned by WPScan

Description

The Defender Security WordPress plugin before 6.4.1 does not verify that the client IP address it derives for its firewall and lockout decisions actually originates from a trusted source, trusting a user-supplied value by default, allowing unauthenticated attackers to spoof their IP address and evade IP-based protections such as login lockout and IP banning, impersonate an allowlisted address, and poison the Defender Security WordPress plugin before 6.4.1's activity logs.

Affected products

VendorProductAffectedFixed
— Defender Security 4.9.0 – < 6.4.1 6.4.1

References