CVE-2025-34064criticalCWE-200CWE-668

CVE-2025-34064: critical vulnerability in OneLogin Active Directory Connector (ADC)

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

Published

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28Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 9epss 0.5%
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.
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N
Affected products
One Identity · OneLogin Active Directory Connector (ADC)
Related CVEs — OneLogin Active Directory Connector (ADC)

In the same product, most dangerous first.

CVE-2025-34063CRITICALOneLogin AD Connector JWT Authentication Bypass via Exposed Signing KeyEPSS 0.6%CVE-2025-34062MEDIUMOneLogin AD Connector API Credential and Signing Key ExposureEPSS 0.2%