What’s Vulnerable › Vulnerabilities

CVE-2025-34063: OneLogin AD Connector JWT Authentication Bypass via Exposed Signing Key

• Severity: critical (CVSS 10.0 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-07-01 · updated 2026-06-17
• Weakness: CWE-290

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.

Affected products

• One Identity OneLogin Active Directory Connector (ADC): before 6.1.5 — fixed in 6.1.5

How to fix

Upgrade to a fixed version: One Identity OneLogin Active Directory Connector (ADC) 6.1.5. Check the vendor advisory for mitigations.

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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