Zero-day vulnerability in File Manager

Arbitrary file upload
CVE-2020-25213

The vulnerability exploitation was detected on September 1st, 2020. The attackers can remotely upload arbitrary files and execute arbitrary code.

Vulnerability details

Advisory: SB2020090202 - Arbitrary file upload in File Manager plugin for WordPress

Vulnerable component: File Manager

CVE-ID: CVE-2020-25213

CVSSv3 score: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C

CWE-ID: CWE-434 - Unrestricted Upload of File with Dangerous Type

Description:

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to insufficient validation of file during file upload in wp-file-manager in the "lib/php/connector.minimal.php" and "lib/files/hardfork.php" files. A remote attacker can upload a malicious file and execute it on the server.

Note: The vulnerability is being actively exploited in the wild.┬а

Public Exploits:

- WP-file-manager v6.9 - Unauthenticated Arbitrary File Upload leading to RCE [Exploit-DB]

External links:

https://blog.nintechnet.com/critical-zero-day-vulnerability-fixed-in-wordpress-file-manager-700000-installations/

https://wpvulndb.com/vulnerabilities/10389/


About zero-day vulnerabilities

Zero-day vulnerability is an undisclosed vulnerability in software that hackers can exploit to compromise computer programs, gain unauthorized access to sensitive data, penetrate networks, etc. We consider vulnerability a zero-day when there is no solution provided from software vendor and the vulnerability is being actively exploited by malicious actors.

Zero-day candidate is a potential zero-day vulnerability in software which might have been used in targeted attacks, however there is no evidence to support this suggestion.