Vulnerability identifier: #VU13497

Vulnerability risk: Low

CVSSv3.1: 4.4 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2018-12895

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
WordPress
Web applications / CMS

Vendor: WordPress.ORG

Description

The vulnerability allows a remote authenticated user to delete arbitrary file on the system.

The vulnerability exists due to improper check for user permissions when deleting files. A remote authenticated user with ability to manage media files can send a specially crafted HTTP request and delete arbitrary file on the server.

Mitigation
Update to version 4.9.7.

Vulnerable software versions

WordPress: 4.9 - 4.9.6, 4.8 - 4.8.4, 4.7 - 4.7.8, 4.4 - 4.4.13, 4.6 - 4.6.9, 4.5 - 4.5.12, 4.3 - 4.3.14, 4.2 - 4.2.18, 4.1 - 4.1.21

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External links
http://blog.vulnspy.com/2018/06/27/Wordpress-4-9-6-Arbitrary-File-Delection-Vulnerbility-Exploit/
http://blog.ripstech.com/2018/wordpress-file-delete-to-code-execution/
http://wordpress.org/news/2018/07/wordpress-4-9-7-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 authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.