Unauthenticated visitor PII disclosure via unchecked AJAX listing
Published Sep 12, 2026 · Updated Sep 12, 2026
Missing authorization in QuantumCloud WPBot 8.4.9 through 8.5.9 allows remote attackers to read chat visitor PII via an AJAX action. The chat-session listing AJAX handler performs neither a capability check nor nonce verification before returning records selected by a caller-supplied date range. No account or user interaction is required, and a wide range exposes stored names, email addresses, and phone numbers for all chat visitors.
Summary
What happened
Missing authorization in QuantumCloud WPBot 8.4.9 through 8.5.9 allows remote attackers to read chat visitor PII via an AJAX action. The chat-session listing AJAX handler performs neither a capability check nor nonce verification before returning records selected by a caller-supplied date range. No account or user interaction is required, and a wide range exposes stored names, email addresses, and phone numbers for all chat visitors.
The record
- CVE
- CVE-2026-87916
- Published
- Sep 12, 2026
- Updated
- Sep 12, 2026
- Vendor
- QuantumCloud
- Product
- WPBot
- Classifications
- T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 12, 2026CVE publishedPublication date reported by the CVE source.
- Sep 12, 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.
- Affected versionversion=8.4.9 <8.6.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
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.
Weakness, pattern, technique
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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