Vulnerability-Lookup

GHSA-J9M2-XX67-38FC

Vulnerability from github – Published: 2026-03-21 06:30 – Updated: 2026-03-21 06:30

Details

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.

Severity ?

5.3 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-3335"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-862"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-21T04:17:20Z",
    "severity": "MODERATE"
  },
  "details": "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 \u2014 the server never contacts Canto\u0027s legitimate API, and the uploaded file originates entirely from the attacker\u0027s 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.",
  "id": "GHSA-j9m2-xx67-38fc",
  "modified": "2026-03-21T06:30:25Z",
  "published": "2026-03-21T06:30:25Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-3335"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/canto/tags/3.1.1/includes/lib/copy-media.php#L152"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/canto/tags/3.1.1/includes/lib/copy-media.php#L306"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/canto/tags/3.1.1/includes/lib/copy-media.php#L71"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/canto/trunk/includes/lib/copy-media.php#L152"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/canto/trunk/includes/lib/copy-media.php#L306"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/canto/trunk/includes/lib/copy-media.php#L71"
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/0777f759-6980-4572-a866-0210bd5f5085?source=cve"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-3335 (GCVE-0-2026-3335)

Vulnerability from cvelistv5 – Published: 2026-03-21 03:26 – Updated: 2026-04-08 16:33

Title

Canto <= 3.1.1 - Missing Authorization to Unauthenticated File Upload

Summary

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.

Severity ?

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CWE

CWE-862 - Missing Authorization

Assigner

Wordfence

References

URL

Tags

	https://www.wordfence.com/threat-intel/vulnerabil…
	https://plugins.trac.wordpress.org/browser/canto/…
	https://plugins.trac.wordpress.org/browser/canto/…
	https://plugins.trac.wordpress.org/browser/canto/…
	https://plugins.trac.wordpress.org/browser/canto/…
	https://plugins.trac.wordpress.org/browser/canto/…
	https://plugins.trac.wordpress.org/browser/canto/…

Impacted products

	Vendor	Product	Version
	flightbycanto	Canto	Affected: 0 , ≤ 3.1.1 (semver)

Credits

heygork

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-3335",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-23T18:22:25.735478Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-23T18:24:08.863Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Canto",
          "vendor": "flightbycanto",
          "versions": [
            {
              "lessThanOrEqual": "3.1.1",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "heygork"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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 \u2014 the server never contacts Canto\u0027s legitimate API, and the uploaded file originates entirely from the attacker\u0027s 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": [
        {
          "cvssV3_1": {
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-862",
              "description": "CWE-862 Missing Authorization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-08T16:33:59.358Z",
        "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
        "shortName": "Wordfence"
      },
      "references": [
        {
          "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/0777f759-6980-4572-a866-0210bd5f5085?source=cve"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/canto/tags/3.1.1/includes/lib/copy-media.php#L71"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/canto/tags/3.1.1/includes/lib/copy-media.php#L152"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/canto/trunk/includes/lib/copy-media.php#L71"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/canto/trunk/includes/lib/copy-media.php#L152"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/canto/tags/3.1.1/includes/lib/copy-media.php#L306"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/canto/trunk/includes/lib/copy-media.php#L306"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-03-20T15:13:52.000Z",
          "value": "Disclosed"
        }
      ],
      "title": "Canto \u003c= 3.1.1 - Missing Authorization to Unauthenticated File Upload"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
    "assignerShortName": "Wordfence",
    "cveId": "CVE-2026-3335",
    "datePublished": "2026-03-21T03:26:30.740Z",
    "dateReserved": "2026-02-27T15:12:19.844Z",
    "dateUpdated": "2026-04-08T16:33:59.358Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-J9M2-XX67-38FC

CVE-2026-3335 (GCVE-0-2026-3335)

Tags

Sightings

Nomenclature