Vulnerability DatabaseCVE-2016-2221
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CVE-2016-2221
Published:May 22, 2016
Updated:June 12, 2026
Open redirect vulnerability in the wp_validate_redirect function in wp-includes/pluggable.php in WordPress before 4.4.2 allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via a malformed URL that triggers incorrect hostname parsing, as demonstrated by an https:example.com URL.
Related Resources (8)
http://www.securityfocus.com/bid/82463
http://www.securitytracker.com/id/1034933
https://wordpress.org/news/2016/02/wordpress-4-4-2-security-and-maintenance-release/
https://codex.wordpress.org/Version_4.4.2
http://www.debian.org/security/2016/dsa-3472
https://core.trac.wordpress.org/changeset/36444
https://wpvulndb.com/vulnerabilities/8377
https://security-tracker.debian.org/tracker/CVE-2016-2221
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CVSS v4
Base Score:
8.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
HIGH
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.4
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
EPSS
Base Score:
3.46