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Vulnerabilities

Vulnerability · CVE-2026-3335

The Canto plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 3.1.1 via the file.

Published Mar 21, 2026 · catalog updated Jun 17, 2026 · the affected product

Check if you run it

No confirmed exploitation is on record for CVE-2026-3335. EPSS is 1.32%. Act only if a listed version of the affected product is installed.

Gaps on this record

  • No plain product name is stored. The page cannot tell you which product to check.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
1.32%
Remediation
Version ranges on file
Affected products
stated named in the record

The Canto plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 3.1.1 via the file. This is due to the file being directly accessible without any authentication, authorization, or nonce checks, and the and 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 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 ( , , , ) are also directly accessible without authentication and make requests using a user-supplied parameter combined with an admin-configured subdomain.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • stated named in the record<= 3.1.1

How to fix CVE-2026-3335

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-3335. EPSS is 1.32%. Act only if a listed version of the affected product is installed.

Which versions are affected?

Compare what you have installed with named in the record <= 3.1.1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-862: Missing Authorization. EPSS 1.32%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

WordPress security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 21, 2026 · NIST NVD

    Detected

    The Canto plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 3.1.1 via the file. This is due to the file being directly accessible without any authentication, authorization, or nonce checks, and the and URL components being accepted as user-supplied POST parameters rather than read from admin-configured options. Since the attacker controls both the de

  2. Jun 17, 2026 · NIST NVD

    Updated

    The Canto plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 3.1.1 via the file. This is due to the file being directly accessible without any authentication, authorization, or nonce checks, and the and URL components being accepted as user-supplied POST parameters rather than read from admin-configured options. Since the attacker controls both the de

Sources

  • CVE.orgVulnerability recordCVE-2026-3335

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-3335

    30-day exploitation probability 1.3%

    first.org
  • NIST NVDVulnerability recordCVE-2026-3335

    The Canto plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 3.1.1 via the file. This is due to the file being directly accessible without any authentication, authorization, or

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.