Arbitrary file deletion in WordPress WordPress

1) Arbitrary file deletion

EUVDB-ID: #VU13497

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 - Improper Access Control

Exploit availability: Yes

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: 4.1 - 4.9.6

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/

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.