Input validation error in WordPress - CVE-2016-2222
Published: May 22, 2016 / Updated: August 9, 2020
Vulnerability identifier: #VU40279
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2016-2222
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: WordPress.ORG
Affected software:
WordPress
WordPress
Detailed vulnerability description
The vulnerability allows a remote non-authenticated attacker to manipulate data.
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. <a href="https://cwe.mitre.org/data/definitions/918.html">CWE-918: Server-Side Request Forgery (SSRF)</a>
How to mitigate CVE-2016-2222
Install update from vendor's website.
Sources
- 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