Insufficient randomization in WordPress - CVE-2017-5493
Published: January 17, 2017 / Updated: January 17, 2017
Vulnerability identifier: #VU4862
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2017-5493
CWE-ID: CWE-330
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 attacker to bypass certain security restriction.
The vulnerability exists due to an error when choosing random numbers for keys within wp-includes/ms-functions.php script in the Multisite WordPress API. A remote attacker can create a specially crafted site signup or user signup request and bypass intended access restriction.
Successful exploitation of the vulnerability may allow an attacker to gain access to otherwise restricted functionality.
How to mitigate CVE-2017-5493
Update to version 4.7.1.