CVE-2025-34063

OneLogin AD Connector JWT Authentication Bypass via Exposed Signing Key

Description

A cryptographic authentication bypass vulnerability exists in OneLogin AD Connector prior to 6.1.5 due to the exposure of a tenant’s SSO JWT signing key via the /api/adc/v4/configuration endpoint. An attacker in possession of the signing key can craft valid JWT tokens impersonating arbitrary users within a OneLogin tenant. The tokens allow authentication to the OneLogin SSO portal and all downstream applications federated via SAML or OIDC. This allows full unauthorized access across the victim’s SaaS environment.

Category

10.0
CVSS
Severity: Critical
CVSS 4.0 •
EPSS 0.10%
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-2025-34063?
CVE-2025-34063 has been scored as a critical severity vulnerability.
How to fix CVE-2025-34063?
To fix CVE-2025-34063, 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-2025-34063 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-34063 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-2025-34063?
CVE-2025-34063 affects One Identity OneLogin Active Directory Connector (ADC).
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