WordPress Plugin Vulnerabilities
Defender Security 4.9.0 - 6.4.0 - Unauthenticated IP Address Spoofing via Smart IP Detection
Description
The plugin 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 plugin's activity logs.
Proof of Concept
Affects Plugins
Fixed in 6.4.1 References
CVE
Classification
Type
SPOOFING
OWASP top 10
CWE
CVSS
Miscellaneous
Original Researcher
Karthik Ramakrishnan
Submitter
Karthik Ramakrishnan
Verified
Yes
WPVDB ID
Timeline
Publicly Published
2026-11-10 (about 2 days ago)
Added
2026-11-10 (about 1 day ago)
Last Updated
2026-11-10 (about 1 day ago)
