Reported vulnerability

WPBot <= 8.5.9 - Missing Authorization to Unauthenticated Email Relay via wpcs_send_email AJAX Action

Q: Which versions of WPBot – AI ChatBot for Live Support, Lead Generation, WordPress Automation, AI Services are affected?

Wordfence lists these affected versions: Start version unspecified, through 8.5.9. Use the version checker above to compare your installed release with this report.

Q: Is a fix available for WPBot – AI ChatBot for Live Support, Lead Generation, WordPress Automation, AI Services?

Wordfence reports a fix for this issue in WPBot – AI ChatBot for Live Support, Lead Generation, WordPress Automation, AI Services. It lists these fixed versions: 8.6.0. Back up your website and test the recommended update before applying it to your live site.

Q: Where can I find my installed plugin version?

In WordPress, open Plugins > Installed Plugins and find the version shown beneath the plugin name.

Published 27 Jul 2026

Updated 28 Jul 2026

CVE-2026-16774

Compare your installed software with the affected versions below. Follow the source’s remediation guidance and test an available update after taking a backup. A database entry describes a reported issue; it does not establish whether a particular website has been compromised.

Does this affect my version?

Check your installed version against this advisory. This compares the report’s version ranges and does not scan your website.

Wordfence advisory

medium · CVSS 5.3

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.

Severity vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

WPBot – AI ChatBot for Live Support, Lead Generation, WordPress Automation, AI Services

Software: plugin · chatbot
Affected versions: Start version unspecified, through 8.5.9
Fix availability: Fix available
Fixed versions: 8.6.0

Recommended action

Update to version 8.6.0, or a newer patched version

Further references (1)

wordfence.com/threat-intel/vulnerabilities/id/3cc6aa06-ab2a-4d5c-bbbe-4c19722ccc53?source=api-prod

Data sources and licences

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CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE®). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.

Read licence terms

Source: Wordfence

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Questions about this vulnerability

Which versions of WPBot – AI ChatBot for Live Support, Lead Generation, WordPress Automation, AI Services are affected?

Wordfence lists these affected versions: Start version unspecified, through 8.5.9. Use the version checker above to compare your installed release with this report.

Is a fix available for WPBot – AI ChatBot for Live Support, Lead Generation, WordPress Automation, AI Services?

Wordfence reports a fix for this issue in WPBot – AI ChatBot for Live Support, Lead Generation, WordPress Automation, AI Services. It lists these fixed versions: 8.6.0. Back up your website and test the recommended update before applying it to your live site.

Where can I find my installed plugin version?

In WordPress, open Plugins > Installed Plugins and find the version shown beneath the plugin name.

Does an affected version mean my website has been hacked?

An affected version means the installed release matches a vulnerability described in this report. It does not show whether anyone has exploited it on your website. The checker compares version numbers with stored reports; it does not inspect your website.

These reports cover at least one of the same plugins, themes or WordPress core. Check each report’s affected versions separately.

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