CVE-2026-3506
WP-Chatbot for Messenger <= 4.9 - Missing Authorization to Unauthenticated Chatbot Configuration Takeover
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
The WP-Chatbot for Messenger plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 4.9. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to overwrite the site's MobileMonkey API token and company ID options, which can be used to hijack chatbot configuration and redirect visitor conversations to an attacker-controlled MobileMonkey account.
| CWE | CWE-862 |
| Vendor | larrykim |
| Product | wp-chatbot for messenger |
| Published | Mar 21, 2026 |
| Last Updated | Apr 8, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
larrykim / WP-Chatbot for Messenger
0 ≤ 4.9
References
wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/32cce973-bc3b-45f1-ad4d-ff395d3a6c8e?source=cve plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/wp-chatbot/trunk/inc/MobileMonkeyApi.php#L37 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/wp-chatbot/tags/4.9/inc/MobileMonkeyApi.php#L37 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/wp-chatbot/tags/4.9/inc/MobileMonkeyApi.php#L52 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/wp-chatbot/tags/4.9/inc/MobileMonkeyApi.php#L409 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/wp-chatbot/tags/4.9/admin/class-htcc-admin.php#L29 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/wp-chatbot/tags/4.9/admin/admin.php#L29 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/wp-chatbot/tags/4.9/inc/class-ht-cc.php#L178
Credits
Kazuma Matsumoto