CVE-2025-34063 OneLogin AD Connector JWT Authentication Bypass via Exposed Signing Key
Attackers can bypass authentication and impersonate users by exploiting an exposed JWT signing key, gaining unauthorized access to SSO portals and federated applications.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-34063?
CVE-2025-34063 is a critical authentication bypass vulnerability in OneLogin Active Directory Connector (ADC), published on 1 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-290
Which versions are affected by CVE-2025-34063?
How do I fix CVE-2025-34063?
No fix has been published for CVE-2025-34063 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2025-34063 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-34063 exists.
Sources
Also known as GHSA-g2mv-fq56-3w42.