The Multi Uploader for Gravity Forms plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 1.1.9 via the move_file function. This is due to insufficient file type validation during chunked upload handling. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No 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 6
https://plugins.trac.wordpress.org/browser/gf-multi-uploader/tags/1.1.9/GFMUAdd…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/gf-multi-uploader/tags/1.1.9/inc/GFM…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/gf-multi-uploader/tags/1.1.9/inc/GFM…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/gf-multi-uploader/tags/1.1.9/inc/GFM…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/gf-multi-uploader/tags/1.1.9/inc/GFM…
security@wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/47337bc1-fa3d-470c-95…
security@wordfence.com