CVE-2026-87918Network attack vectorHinoki check available

Unauthenticated API-cost abuse via unchecked AJAX actions

Published Sep 12, 2026 · Updated Sep 12, 2026

Missing authorization in QuantumCloud WPBot before 8.5.7 allows remote attackers to spend configured AI-provider credits via AJAX requests. Several unauthenticated AJAX handlers forward attacker-supplied prompts to configured AI providers without authorization or nonce checks. A reachable WordPress site with an AI provider enabled and a funded API key bears the resulting third-party usage charges.

CVSS severityUnavailable
Unscored
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Missing authorization in QuantumCloud WPBot before 8.5.7 allows remote attackers to spend configured AI-provider credits via AJAX requests. Several unauthenticated AJAX handlers forward attacker-supplied prompts to configured AI providers without authorization or nonce checks. A reachable WordPress site with an AI provider enabled and a funded API key bears the resulting third-party usage charges.

The record

CVE
CVE-2026-87918
Published
Sep 12, 2026
Updated
Sep 12, 2026
Vendor
QuantumCloud
Product
WPBot – AI ChatBot for Live Support, Lead Generation, AI Services
Classifications
T1190, T1496
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 12, 2026CVE publishedPublication date reported by the CVE source.
  2. 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.

  1. Affected versionversion=0 <8.5.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

QuantumCloud · WPBot – AI ChatBot for Live Support, Lead Generation, AI Servicesversion=0 <8.5.7

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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

T1190Exploit Public-Facing Application
T1496Resource Hijacking

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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