The Chatbot plugin for WordPress is vulnerable to Missing Authorization in versions up to, and including, 8.5.9 via the wpcs_send_email() AJAX handler. This is due to the wpcs_send_email() function being registered on both wp_ajax_wpcs_send_email and wp_ajax_nopriv_wpcs_send_email with no nonce verification, capability check, or rate limiting, while forwarding attacker-controlled recipient, subject, and body directly to wp_mail(). This makes it possible for unauthenticated attackers to send arbitrary emails to any recipient from the site's domain, enabling spam, phishing, and abuse that can lead to the site's IP/domain being blacklisted.
Metrics
Affected Vendors & Products
References
History
Tue, 28 Jul 2026 18:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Quantumcloud
Quantumcloud wpbot – Ai Chatbot For Live Support, Lead Generation, Ai Services Wordpress Wordpress wordpress |
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| Vendors & Products |
Quantumcloud
Quantumcloud wpbot – Ai Chatbot For Live Support, Lead Generation, Ai Services Wordpress Wordpress wordpress |
Tue, 28 Jul 2026 16:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | The Chatbot plugin for WordPress is vulnerable to Missing Authorization in versions up to, and including, 8.5.9 via the wpcs_send_email() AJAX handler. This is due to the wpcs_send_email() function being registered on both wp_ajax_wpcs_send_email and wp_ajax_nopriv_wpcs_send_email with no nonce verification, capability check, or rate limiting, while forwarding attacker-controlled recipient, subject, and body directly to wp_mail(). This makes it possible for unauthenticated attackers to send arbitrary emails to any recipient from the site's domain, enabling spam, phishing, and abuse that can lead to the site's IP/domain being blacklisted. | |
| Title | WPBot <= 8.5.9 - Missing Authorization to Unauthenticated Email Relay via wpcs_send_email AJAX Action | |
| Weaknesses | CWE-862 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: Wordfence
Published:
Updated: 2026-07-28T14:53:38.807Z
Reserved: 2026-07-23T17:09:30.160Z
Link: CVE-2026-16774
Updated: 2026-07-28T13:36:32.258Z
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OpenCVE Enrichment
Updated: 2026-07-28T18:15:03Z