CVE-2016-4029

Severity: high (CVSS 8.6 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2016-08-07 · updated 2026-06-17
Weakness: CWE-918

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.

Affected products

Debian Linux: 8.0
WordPress: before 4.5 — fixed in 4.5

How to fix

Upgrade to a fixed version: WordPress 4.5. Check the vendor advisory for mitigations.

References

http://codex.wordpress.org/Version_4.5
http://www.debian.org/security/2016/dsa-3681
http://www.securitytracker.com/id/1036594
https://core.trac.wordpress.org/query?status=closed&milestone=4.5
https://wpvulndb.com/vulnerabilities/8473
http://codex.wordpress.org/Version_4.5
http://www.debian.org/security/2016/dsa-3681
http://www.securitytracker.com/id/1036594
https://core.trac.wordpress.org/query?status=closed&milestone=4.5
https://wpvulndb.com/vulnerabilities/8473

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