Vulnerability identifier: #VU19313

Vulnerability risk: Medium

CVSSv3.1: 6.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2019-14206

CWE-ID: CWE-22

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Adaptive Images for WordPress
Web applications / Modules and components for CMS

Vendor: Nevma

Description

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to the plugin contains a cache mechanism that allows the generated resized images to be saved and cached to prevent excessive resources usage. A remote attacker can send a specially crafted file and delete arbitrary files on the system.

The only condition to successfully exploit this vulnerability is that the file that we pass as "$source_file" is newer than the file that we pass as "$cache_file".

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Adaptive Images for WordPress: 0.2.08 - 0.6.66

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External links
http://github.com/markgruffer/markgruffer.github.io/blob/master/_posts/2019-07-19-adaptive-images-for-wordpress-0-6-66-lfi-rce-file-deletion.markdown
http://markgruffer.github.io/2019/07/19/adaptive-images-for-wordpress-0-6-66-lfi-rce-file-deletion.html

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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. However, proof of concept for this vulnerability is available.