Canto <= 3.1.1 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Setting Modification
Summary
| CVE | CVE-2026-6441 |
|---|---|
| State | PUBLISHED |
| Assigner | Wordfence |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-04-17 07:16:03 UTC |
| Updated | 2026-04-17 07:16:03 UTC |
| Description | The Canto plugin for WordPress is vulnerable to Missing Authorization in versions up to and including 3.1.1. This is due to the absence of any capability check or nonce verification in the updateOptions() function, which is exposed via two AJAX hooks: wp_ajax_updateOptions (class-canto.php line 231) and wp_ajax_fbc_updateOptions (class-canto-settings.php line 76). Both hooks are registered exclusively under the wp_ajax_ prefix (requiring only a logged-in user), with no call to current_user_can() or check_ajax_referer(). This makes it possible for authenticated attackers with subscriber-level access and above to arbitrarily modify or delete plugin options controlling cron scheduling behavior (fbc_duplicates, fbc_cron, fbc_schedule, fbc_cron_time_day, fbc_cron_time_hour, fbc_cron_start) and to manipulate or clear the plugin's scheduled WordPress cron event (fbc_scheduled_update). |
Risk And Classification
Primary CVSS: v3.1 4.3 MEDIUM from [email protected]
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
EPSS: 0.000310000 probability, percentile 0.089330000 (date 2026-04-18)
Problem Types: CWE-862 | CWE-862 CWE-862 Missing Authorization
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 4.3 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
| 3.1 | CNA | DECLARED | 4.3 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
LowAvailability
NoneCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Flightbycanto | Canto | affected 3.1.1 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| plugins.trac.wordpress.org/browser/canto/tags/3.1.1/includes/class-canto.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/canto/trunk/includes/class-canto.php | [email protected] | plugins.trac.wordpress.org | |
| www.wordfence.com/threat-intel/vulnerabilities/id/c1a0200f-9861-4eca-adbf-d458e... | [email protected] | www.wordfence.com | |
| plugins.trac.wordpress.org/browser/canto/trunk/includes/class-canto-settings.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/canto/tags/3.1.1/includes/class-canto-settings.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/canto/trunk/includes/class-canto.php | [email protected] | plugins.trac.wordpress.org | |
| plugins.trac.wordpress.org/browser/canto/tags/3.1.1/includes/class-canto.php | [email protected] | plugins.trac.wordpress.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Abhirup Konwar (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-04-16T18:16:51.000Z | Disclosed |
There are currently no legacy QID mappings associated with this CVE.