The Advanced Custom Fields: Extended plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 0.9.2.6. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to permanently delete arbitrary WordPress media library attachments by supplying a numeric attachment ID in the form submission without any ownership or capability verification.
Exploitation requires a site administrator to have configured a public-facing ACFE form with an Email action whose attachment row uses a dynamic {field:...} source bound to a submittable field with the Delete option enabled.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
High
Difficult 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
Low
Partial disruption
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products
hwk-fr:advanced custom fields: extended
References 4
https://www.wordfence.com/threat-intel/vulnerabilities/id/ed7f3f80-4d08-440f-b9…
NVD
https://plugins.trac.wordpress.org/browser/acf-extended/tags/0.9.2.3/includes/m…
NVD
https://plugins.trac.wordpress.org/browser/acf-extended/tags/0.9.2.3/includes/m…
NVD
https://plugins.trac.wordpress.org/changeset/3667996/acf-extended
NVD