Paper/Archive/CVE-2025-34064

CVE-2025-34064

One Identity OneLogin Active Directory Connector (ADC) — OneLogin AD Connector Log S3 Bucket Hijack Leading to Cross-Tenant Data Leakage

EPSS 0.5%public exploit CVSS 9.0

critical.is priorityof 100

CVSS 9.0 (CNA)9.0 / 10 × 3027.0 Not in CISA KEV+300.0 EPSS percentile 44.8.448 × 209.0 Exploit: SSVC poc+1010.0 SSVC exploitation: poc+100.0

Description · from the CVE record

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

ProductAffectedFixed inSource

OneLogin Active Directory Connector (ADC)< 6.1.56.1.5CNA

Scores by source

VulnCheck (CNA)9.0CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N

CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: partial

References

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