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Vulnerability record · CVE-2016-2222 · published 22 May 2016

CVE-2016-2222: Wordpress vulnerability

Wordpress · Wordpress

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.

8.6 CVSS 3.0 High EPSS 7.9% · top 5.5%
8.6CVSS 3.0 base score, v2 5.0
7.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
18References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
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 Patch
https://core.trac.wordpress.org/changeset/36435
https://hackerone.com/reports/110801 Exploit
https://news.ycombinator.com/item?id=20433070
https://wordpress.org/news/2016/02/wordpress-4-4-2-security-and-maintenance-release/ PatchVendor Advisory
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
https://codex.wordpress.org/Version_4.4.2 Patch
https://core.trac.wordpress.org/changeset/36435
https://hackerone.com/reports/110801 Exploit
https://news.ycombinator.com/item?id=20433070
https://wordpress.org/news/2016/02/wordpress-4-4-2-security-and-maintenance-release/ PatchVendor Advisory
https://wpvulndb.com/vulnerabilities/8376

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2016-2222), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.