CVE-2026-6441Network attack vector

Subscriber-level option modification via unchecked AJAX handlers

Published Apr 17, 2026 · Updated Apr 17, 2026

Missing authorization in Canto for WordPress 3.1.1 and earlier allows remote authenticated users to alter plugin and cron options. The updateOptions() function accepts AJAX requests through wp_ajax_updateOptions and wp_ajax_fbc_updateOptions without a capability check or nonce verification. Subscriber-level access is sufficient to change or delete scheduling options and manipulate or clear the fbc_scheduled_update WordPress cron event.

CVSS severity4.3
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Canto for WordPress 3.1.1 and earlier allows remote authenticated users to alter plugin and cron options. The updateOptions() function accepts AJAX requests through wp_ajax_updateOptions and wp_ajax_fbc_updateOptions without a capability check or nonce verification. Subscriber-level access is sufficient to change or delete scheduling options and manipulate or clear the fbc_scheduled_update WordPress cron event.

The record

CVE
CVE-2026-6441
Published
Apr 17, 2026
Updated
Apr 17, 2026
Vendor
Canto
Product
Canto
Classifications
CWE-862
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 17, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=3.1.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Canto · Cantoversion=0 <=3.1.1

Published CVSS scores

4.3WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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