CVE-2016-4029 Server-side request forgery in n/a

What is CVE-2016-4029?

CVE-2016-4029 is a high-severity server-side request forgery vulnerability in Debian Debian Linux, published on 7 Aug 2016. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

WordPress before 4.5 does not consider octal and hexadecimal IP address formats when determining an intranet address, which allows remote attackers to bypass an intended SSRF protection mechanism via a crafted address.

Weakness: CWE-918

Which versions are affected by CVE-2016-4029?

It affects 2 products.

Products include Debian Debian Linux, Wordpress Wordpress.

How do I fix CVE-2016-4029?

Upgrade to a fixed version.

Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.

Is CVE-2016-4029 being exploited?

There is no known exploitation of CVE-2016-4029 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2016-4029, GHSA-j2rp-vprg-5m9q, UBUNTU-CVE-2016-4029.