CVE-2016-2222

Severity: high (CVSS 8.6 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 7.9% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2016-05-22 · updated 2026-06-17

Description

The wp_http_validate_url function in wp-includes/http.php in WordPress before 4.4.2 allows remote attackers to conduct server-side request forgery (SSRF) attacks via a zero value in the first octet of an IPv4 address in the u parameter to wp-admin/press-this.php.

Affected products

WordPress: 4.4.1

References

http://www.debian.org/security/2016/dsa-3472
http://www.securityfocus.com/bid/82454
http://www.securitytracker.com/id/1034933
https://codex.wordpress.org/Version_4.4.2
https://core.trac.wordpress.org/changeset/36435
https://hackerone.com/reports/110801
https://news.ycombinator.com/item?id=20433070
https://wordpress.org/news/2016/02/wordpress-4-4-2-security-and-maintenance-release/
https://wpvulndb.com/vulnerabilities/8376
http://www.debian.org/security/2016/dsa-3472
http://www.securityfocus.com/bid/82454
http://www.securitytracker.com/id/1034933

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