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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-3335 Detail

Description

The Canto plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 3.1.1 via the `/wp-content/plugins/canto/includes/lib/copy-media.php` file. This is due to the file being directly accessible without any authentication, authorization, or nonce checks, and the `fbc_flight_domain` and `fbc_app_api` URL components being accepted as user-supplied POST parameters rather than read from admin-configured options. Since the attacker controls both the destination server and the `fbc_app_token` value, the entire fetch-and-upload chain is attacker-controlled — the server never contacts Canto's legitimate API, and the uploaded file originates entirely from the attacker's infrastructure. This makes it possible for unauthenticated attackers to upload arbitrary files (constrained to WordPress-allowed MIME types) to the WordPress uploads directory. Additional endpoints (`detail.php`, `download.php`, `get.php`, `tree.php`) are also directly accessible without authentication and make requests using a user-supplied `app_api` parameter combined with an admin-configured subdomain.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://plugins.trac.wordpress.org/browser/canto/tags/3.1.1/includes/lib/copy-media.php#L152 Wordfence
https://plugins.trac.wordpress.org/browser/canto/tags/3.1.1/includes/lib/copy-media.php#L306 Wordfence
https://plugins.trac.wordpress.org/browser/canto/tags/3.1.1/includes/lib/copy-media.php#L71 Wordfence
https://plugins.trac.wordpress.org/browser/canto/trunk/includes/lib/copy-media.php#L152 Wordfence
https://plugins.trac.wordpress.org/browser/canto/trunk/includes/lib/copy-media.php#L306 Wordfence
https://plugins.trac.wordpress.org/browser/canto/trunk/includes/lib/copy-media.php#L71 Wordfence
https://www.wordfence.com/threat-intel/vulnerabilities/id/0777f759-6980-4572-a866-0210bd5f5085?source=cve Wordfence

Weakness Enumeration

CWE-ID CWE Name Source
CWE-862 Missing Authorization Wordfence  

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-3335
NVD Published Date:
03/21/2026
NVD Last Modified:
03/21/2026
Source:
Wordfence