CVE-2025-34064Known exploitationPublic exploitNetwork attack vector

Cross-tenant secret exposure via unowned log bucket

Published Jul 1, 2025 · Updated Jul 1, 2025

Information disclosure in OneLogin Active Directory Connector before 6.1.5 allows remote attackers to receive cross-tenant logs. The connector's logging path sends files to the fixed onelogin-adc-logs-production S3 bucket without verifying that OneLogin owns the destination. Exploitation requires control of that unclaimed bucket; exposed directory tokens and user metadata enable signing-key retrieval and user impersonation.

CVSS severity9.0
Critical
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in OneLogin Active Directory Connector before 6.1.5 allows remote attackers to receive cross-tenant logs. The connector's logging path sends files to the fixed onelogin-adc-logs-production S3 bucket without verifying that OneLogin owns the destination. Exploitation requires control of that unclaimed bucket; exposed directory tokens and user metadata enable signing-key retrieval and user impersonation.

The record

CVE
CVE-2025-34064
Published
Jul 1, 2025
Updated
Jul 1, 2025
Vendor
One Identity
Product
OneLogin Active Directory Connector
Classifications
CWE-200, CWE-668, T1552.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 13, 2025Exploitation reportedResearcher-controlled bucket received production tenant logs
  2. Jul 1, 2025CVE publishedPublication date reported by the CVE source.
  3. Jul 1, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <6.1.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

One Identity · OneLogin Active Directory Connectorversion=0 <6.1.5

Published CVSS scores

9.0VulnCheckCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
CWE-668Exposure of Resource to Wrong Sphere
T1552.001Unsecured Credentials: Credentials In Files

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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