CVE-2025-34064

OneLogin AD Connector Log S3 Bucket Hijack Leading to Cross-Tenant Data Leakage

9.0 Critical

A cloud infrastructure misconfiguration in OneLogin AD Connector results in log data being sent to a hardcoded S3 bucket (onelogin-adc-logs-production) without validating bucket ownership. An attacker who registers this unclaimed bucket can begin receiving log files from other OneLogin tenants. These logs may contain sensitive data such as directory tokens, user metadata, and environment configuration. This enables cross-tenant leakage of secrets, potentially allowing JWT signing key recovery and user impersonation.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: Low
Availability: None

Exploit likelihood

0.53%Up 0.5 points since Jul 2, 2025

What each source reports

CVE List Score used 9.0

OneLogin AD Connector Log S3 Bucket Hijack Leading to Cross-Tenant Data Leakage

Record: CVE-2025-34064
CVSS 4.0: 9.0 CriticalCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N
Weakness: CWE-668, CWE-200
Updated: 2026-11-02

EUVDEUVD-2025-19634 9.0

Record: EUVD-2025-19634
CVSS 4.0: 9.0 CriticalCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-p59x-w56c-2jj2 9.0

A cloud infrastructure misconfiguration in OneLogin AD Connector results in log data being sent...

Record: GHSA-p59x-w56c-2jj2
CVSS 4.0: 9.0 CriticalCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/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
Weakness: CWE-200
Updated: 2026-11-02

NVD 9.0

Record: CVE-2025-34064
CVSS 4.0: 9.0 CriticalCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/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
Weakness: CWE-200, CWE-668
Updated: 2026-11-02

Affected products

one identity onelogin active directory connector (adc)

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-34064 is a critical vulnerability (CVSS 9.0) in One Identity Onelogin Active Directory Connector (adc), published July 1, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.53%, the 44th percentile. No source names a fixed version.