CVE-2025-34064

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

Description

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.

Category

9.0
CVSS
Severity: Critical
CVSS 4.0 •
EPSS 0.04%
Vendor Advisory onelogin.com
Affected: One Identity OneLogin Active Directory Connector (ADC)
Published at:
Updated at:

References

Link Tags
https://support.onelogin.com/product-notification/noti-00001768 patch vendor advisory
https://specterops.io/blog/2025/06/10/onelogin-many-issues-how-i-pivoted-from-a-trial-tenant-to-compromising-customer-signing-keys/ technical description
https://vulncheck.com/advisories/onelogin-ad-connector-account-compromise third party advisory

Frequently Asked Questions

What is the severity of CVE-2025-34064?
CVE-2025-34064 has been scored as a critical severity vulnerability.
How to fix CVE-2025-34064?
To fix CVE-2025-34064, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-34064 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-34064 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-34064?
CVE-2025-34064 affects One Identity OneLogin Active Directory Connector (ADC).
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