CVE-2016-2222

CVE-2016-2222 is a high-severity vulnerability in Wordpress with a CVSS 3.x base score of 8.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

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.

Frequently asked questions

What is CVE-2016-2222?
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.
How severe is CVE-2016-2222?
CVE-2016-2222 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2016-2222 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-2222?
CVE-2016-2222 affects Wordpress. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2016-2222?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2016-2222 published?
CVE-2016-2222 was published on 2016-05-22 and last updated on 2026-06-17.

References

Affected products (1)

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