The Database Addon for Contact Form 7 – CFDB7 plugin for WordPress is vulnerable to Arbitrary File Deletion in versions up to, and including, 1.4.1. This is due to the plugin storing arbitrary (non-form-tag) submission fields in its db7_forms row and the process_bulk_action() delete handler then matching any stored key whose name contains the substring 'cfdb7_file' and passing the stored value directly to unlink() without validating that the file actually belongs to the submission being deleted or constraining the filename with basename()/realpath(). This makes it possible for unauthenticated attackers to inject a crafted multipart field.
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
None
No data leak
Integrity
Low
Partial data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
References 5
https://plugins.trac.wordpress.org/browser/contact-form-cfdb7/tags/1.4.0/contac…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/contact-form-cfdb7/tags/1.4.0/inc/ad…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/contact-form-cfdb7/tags/1.4.0/inc/ad…
security@wordfence.com
https://plugins.trac.wordpress.org/changeset?reponame=&old=3737068%40contact-fo…
security@wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/7de3606a-254c-4e5f-94…
security@wordfence.com