The AnyComment plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'email' parameter in versions up to, and including, 0.3.6. This is due to insufficient input sanitization on the public /wp-json/anycomment/v1/subscribe REST endpoint and missing output escaping in AnyCommentSubscriptionsTable::column_default(), which returns the stored email verbatim into an HTML <td> when the subscription's user_ID does not resolve to an existing WP_User. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever an administrator accesses the AnyComment → Subscriptions admin page.
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
Low
Partial 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/anycomment/tags/0.3.6/includes/Admin…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/anycomment/tags/0.3.6/includes/Model…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/anycomment/tags/0.3.6/includes/Rest/…
security@wordfence.com
https://plugins.trac.wordpress.org/browser/anycomment/tags/0.3.6/includes/Rest/…
security@wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/ce925d1c-2254-49ea-9f…
security@wordfence.com