The Media Cleaner: Clean your WordPress! plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 7.0.3. This is due to the `get_urls_from_html()` function using `DOMDocument::loadHTMLFile()` to fetch iframe source URLs with an insufficient hostname validation check that relies on a substring match against the site's server name. This makes it possible for authenticated attackers, with Administrator-level access and above, to make web requests to arbitrary locations originating from the web application, which can be used to query and interact with internal services.
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
Low
Partial data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
References 5
https://plugins.trac.wordpress.org/browser/media-cleaner/tags/7.0.3/classes/cor…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/media-cleaner/tags/7.0.3/classes/cor…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/media-cleaner/tags/7.0.3/classes/res…
security@wordfence.com
https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&n%…
security@wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/e9c9214d-45d4-4477-82…
security@wordfence.com