CVE-2025-34064

9.0 criticalEPSS 0.5%

Critical (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.

Severity

CVSS 4.0

9.0 critical

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

EPSS: 0.5% chance of exploitation in the next 30 days; higher than 44% of CVEs (scores of 2026-10-31)
CWEs: CWE-200, CWE-668
Published: 2025-07-01
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

References

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

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