Vulnerability identifier: #VU4860

Vulnerability risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-5491

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
WordPress
Web applications / CMS

Vendor: WordPress.ORG

Description

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

The vulnerability exists due to an error within wp-mail.php script. A remote attacker can bypass imposed posting restrictions using a spoofed mail server with name mail.example.com.

Successful exploitation of the vulnerability may allow an attacker to perform unauthorized postings.

Mitigation
Update to version 4.7.1.

Vulnerable software versions

WordPress: 4.7

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External links
http://wordpress.org/news/2017/01/wordpress-4-7-1-security-and-maintenance-release/

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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.