CVE-2025-34064: One Identity Onelogin Active Directory Connector ADC

Critical severity, CVSS 9.0. EPSS: 0.5% chance of exploitation in the next 30 days.

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.

Affected products

• One Identity Onelogin Active Directory Connector ADC: before 6.1.5 (fixed in 6.1.5)

Published 2025-07-01. Last modified 2026-06-17.