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CyberPanel CVE-2026-87820

| EUVDEUVD-2026-74846 MEDIUM
Information Exposure (CWE-200)
2026-09-09 VulnCheck GHSA-2fq6-4p4m-j842
Information Disclosure Cyberpanel Usmannasir
6.9
CVSS 4.0 · Vendor: VulnCheck
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Severity by source

Vendor (VulnCheck) PRIMARY
6.9 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
5.3 MEDIUM

Unauthenticated network access with no special conditions; impact limited to partial confidentiality (usernames, key prefixes) with no integrity or availability consequence.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

2
Source Code Evidence Fetched
Sep 09, 2026 - 12:11 vuln.today
Analysis Generated
Sep 09, 2026 - 12:11 vuln.today

DescriptionCVE.org

CyberPanel versions 2.4.3 through 2.4.5 expose unauthenticated AI Scanner debugging endpoints that disclose administrator usernames, API-key prefixes, scan identifiers, target domains, and account metadata. Unauthenticated attackers can enumerate panel administrators and recent scanner activity to inventory multi-tenant installations and facilitate follow-on attacks.

AnalysisAI

CyberPanel versions 2.4.3 through 2.4.5 expose unauthenticated AI Scanner callback and status-update endpoints that return administrator usernames, API-key prefixes, scan identifiers, target domains, and account metadata without requiring any credentials. Unauthenticated network attackers can systematically enumerate panel administrators and recent scanner activity across multi-tenant hosting installations, enabling reconnaissance for follow-on credential attacks or phishing. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Persist
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Impact
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Vulnerability AssessmentAI

Exploitation The AI Scanner module endpoints in CyberPanel 2.4.3-2.4.5 require no authentication and accept unauthenticated HTTP requests from any network-reachable source; no special configuration, user interaction, or account credentials are needed. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The provided CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N) accurately represents the exposure: unauthenticated, low-complexity network access yielding partial confidentiality impact with no integrity or availability consequence. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Upgrade to CyberPanel 2.4.6, which introduces mandatory X-API-Key header validation to both the AI Scanner scan_callback and receive_status_update endpoints (patch commit 20484fd1786a424054386e5d6290d66b47cab3a3). … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-87820 vulnerability details – vuln.today
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