Insufficient randomization in WordPress WordPress

1) Insufficient randomization

EUVDB-ID: #VU9453

Risk: Low

CVSSv3.1: 3.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-17091

CWE-ID: CWE-330 - Use of Insufficiently Random Values

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass certain security restrictions.

The vulnerability exists in wp-admin/user-new.php script due to usage of a determinate substring in newbloguser key, which can be directly derived from the user ID. A remote attacker can guess the key and bypass intended access restrictions.

Mitigation

Update to version 4.9.1.

Vulnerable software versions

WordPress: 3.7 - 4.9

External links

http://wordpress.org/news/2017/11/wordpress-4-9-1-security-and-maintenance-release/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.