CVE-2026-6441 | flightbycanto Canto Plugin up to 3.1.1 on WordPress class-canto.php updateOptions authorization

VDB-358029 · CVE-2026-6441 · GCVE-0-2026-6441 FLIGHTBYCANTO CANTO PLUGIN UP TO 3.1.1 ON WORDPRESS CLASS-CANTO.PHP UPDATEOPTIONS AUTHORIZATION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 5.2 $0-$5k 2.04+ Summaryinfo A vulnerability was found in flightbycanto Canto Plugin up to 3.1.1 on WordPress. It has been rated as critical. Affected by this issue is the function updateOptions of the file class-canto.php. Performing a manipulation results in authorization. This vulnerability is cataloged as CVE-2026-6441. It is possible to initiate the attack remotely. There is no exploit available. Detailsinfo A vulnerability classified as critical has been found in flightbycanto Canto Plugin up to 3.1.1 on WordPress. This affects the function updateOptions of the file class-canto.php. The manipulation with an unknown input leads to a authorization vulnerability. CWE is classifying the issue as CWE-862. The product does not perform an authorization check when an actor attempts to access a resource or perform an action. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is: 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). The weakness was shared by Abhirup Konwar. The advisory is shared at wordfence.com. This vulnerability is uniquely identified as CVE-2026-6441 since 04/16/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 04/17/2026). By approaching the search of inurl:class-canto.php it is possible to find vulnerable targets with Google Hacking. There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. Productinfo Type WordPress Plugin Vendor flightbycanto Name Canto Plugin Version 3.1.0 3.1.1 CPE 2.3info 🔒 🔒 CPE 2.2info 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 5.3 VulDB Meta Temp Score: 5.2 VulDB Base Score: 6.3 VulDB Temp Score: 6.1 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 4.3 CNA Vector (Wordfence): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Authorization CWE: CWE-862 / CWE-863 / CWE-285 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Google Hack: 🔒 Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: no mitigation known Status: 🔍 0-Day Time: 🔒 Timelineinfo 04/16/2026 CVE reserved 04/17/2026 +1 days Advisory disclosed 04/17/2026 +0 days VulDB entry created 04/17/2026 +0 days VulDB entry last update Sourcesinfo Advisory: wordfence.com Researcher: Abhirup Konwar Status: Not defined CVE: CVE-2026-6441 (🔒) GCVE (CVE): GCVE-0-2026-6441 GCVE (VulDB): GCVE-100-358029 Entryinfo Created: 04/17/2026 09:07 Changes: 04/17/2026 09:07 (65) Complete: 🔍 Cache ID: 99:298:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸