The Meta Box plugin for WordPress is vulnerable to arbitrary file deletion due to insufficient file path validation in the 'ajax_delete_file' function in all versions up to, and including, 5.11.1. This makes it possible for authenticated attackers, with Contributor-level access and above, to delete arbitrary files on the server, which can easily lead to remote code execution when the right file is deleted (such as wp-config.php).
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
High
Admin privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
Weakness Type (CWE)
References 5
https://github.com/wpmetabox/meta-box/pull/1654
security@wordfence.com
https://plugins.trac.wordpress.org/browser/meta-box/tags/5.11.0/inc/fields/file…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/meta-box/tags/5.11.0/inc/fields/file…
security@wordfence.com
https://plugins.trac.wordpress.org/changeset/3475210/meta-box#file3
security@wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/036467de-95bb-4bfd-95…
security@wordfence.com