CVE-2026-16773Network attack vector

Unauthenticated transcript exfiltration via unchecked email destination

Published Jul 28, 2026 · Updated Jul 28, 2026

Sensitive information exposure in QuantumCloud WPBot 8.5.9 and earlier allows remote attackers to exfiltrate stored chat transcripts and user PII. The unauthenticated wpbot_send_email_transcript_free AJAX handler accepts a requester-supplied destination address and emails records from the wpbot_user and wpbot_conversation tables without verifying identity or transcript ownership. Any network client that can reach WordPress AJAX can obtain names, email addresses, phone numbers, and conversation content; no account or user interaction is required.

CVSS severity5.3
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Sensitive information exposure in QuantumCloud WPBot 8.5.9 and earlier allows remote attackers to exfiltrate stored chat transcripts and user PII. The unauthenticated wpbot_send_email_transcript_free AJAX handler accepts a requester-supplied destination address and emails records from the wpbot_user and wpbot_conversation tables without verifying identity or transcript ownership. Any network client that can reach WordPress AJAX can obtain names, email addresses, phone numbers, and conversation content; no account or user interaction is required.

The record

CVE
CVE-2026-16773
Published
Jul 28, 2026
Updated
Jul 28, 2026
Vendor
QuantumCloud
Product
WPBot
Classifications
CWE-200, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=8.5.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

QuantumCloud · WPBotversion=0 <=8.5.9

Published CVSS scores

5.3WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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