# CVE-2026-16773: QuantumCloud WPBot sensitive information exposure in chat transcripts

Source: https://junglewise.ai/threats/cve-2026-16773-quantumcloud-wpbot-sensitive-information-exposure-in-chat  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-28. Updated: 2026-07-28  
License: CC BY 4.0 with a link back

CVE-2026-16773 · Severity: medium · CVSS 5.3 · Published 2026-07-28

A vulnerability in the WPBot plugin for WordPress, which provides AI-driven customer support and lead generation, allows unauthorized individuals to access private chat logs. An attacker can remotely trigger the plugin to send full conversation transcripts and user contact details, such as names and phone numbers, to an email address they control. This could lead to the exposure of sensitive customer data and proprietary business interactions.

Technologies: [QuantumCloud WPBot](https://junglewise.ai/threats/technologies/wpbot). Vendors: [QuantumCloud](https://junglewise.ai/threats/vendors/quantumcloud).

## Quick answers

**Is CVE-2026-16773 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-16773 being exploited in the wild.

**How severe is CVE-2026-16773?** Medium severity, with a CVSS score of 5.3, published 28 July 2026.

**Which products and versions are affected?** QuantumCloud WPBot up to, and including, 8.5.9.

**Is there a fix for CVE-2026-16773?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-16773 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-16773?** Check whether you run QuantumCloud WPBot at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The WPBot plugin for WordPress is vulnerable to sensitive information exposure due to an insecure implementation of the 'wpbot_send_email_transcript_free' function. This function lacks proper authorization or validation, allowing unauthenticated remote attackers to exfiltrate data from the 'wpbot_user' and 'wpbot_conversation' database tables. By sending a crafted request, an attacker can direct the plugin to email full chat transcripts and associated Personally Identifiable Information (PII), including names, email addresses, and phone numbers, to an arbitrary email address. The issue is present in all versions up to 8.5.9 and has been addressed in subsequent updates.

## Affected products

- QuantumCloud WPBot – AI ChatBot for Live Support, Lead Generation, AI Services up to, and including, 8.5.9

## Timeline

- 2026-07-28: disclosed
- 2026-07-28: advisory

## References

- [https://plugins.trac.wordpress.org/browser/chatbot/tags/8.5.9/includes/chat-sessions/wpbot-chat-sessions.php](https://plugins.trac.wordpress.org/browser/chatbot/tags/8.5.9/includes/chat-sessions/wpbot-chat-sessions.php)
- [https://plugins.trac.wordpress.org/browser/chatbot/tags/8.5.9/includes/chat-sessions/wpbot-chat-sessions.php](https://plugins.trac.wordpress.org/browser/chatbot/tags/8.5.9/includes/chat-sessions/wpbot-chat-sessions.php)
- [https://plugins.trac.wordpress.org/browser/chatbot/tags/8.5.9/includes/chat-sessions/wpbot-chat-sessions.php](https://plugins.trac.wordpress.org/browser/chatbot/tags/8.5.9/includes/chat-sessions/wpbot-chat-sessions.php)
- [https://plugins.trac.wordpress.org/browser/chatbot/tags/8.5.9/includes/chat-sessions/wpbot-chat-sessions.php](https://plugins.trac.wordpress.org/browser/chatbot/tags/8.5.9/includes/chat-sessions/wpbot-chat-sessions.php)
- [https://plugins.trac.wordpress.org/changeset?reponame=&old=3621386%40chatbot&new=3621386%40chatbot](https://plugins.trac.wordpress.org/changeset?reponame=&old=3621386%40chatbot&new=3621386%40chatbot)
- [https://www.wordfence.com/threat-intel/vulnerabilities/id/5463548c-22bd-4645-a94d-ee8c6a236337?source=cve](https://www.wordfence.com/threat-intel/vulnerabilities/id/5463548c-22bd-4645-a94d-ee8c6a236337?source=cve)

## Related threats

- [QuantumCloud Chatbot missing authorization in wpcs_send_email AJAX handler](https://junglewise.ai/threats/cve-2026-16774-quantumcloud-chatbot-missing-authorization-in-wpcs-send-email)
- [QuantumCloud WPBot authorization bypass in RAG document processing](https://junglewise.ai/threats/cve-2026-15610-quantumcloud-wpbot-authorization-bypass-in-rag-document)
- [QuantumCloud WPBot stored XSS in conversation parameter](https://junglewise.ai/threats/cve-2026-13731-quantumcloud-wpbot-stored-xss-in-conversation-parameter)