CVE-2025-46345 Auth0 Account Link Extension JWT Invalid Signature Validation
Attackers can forge JWTs to bypass signature validation and access user information without proper authorization in the Auth0 Account Link Extension.
- 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-2025-46345?
CVE-2025-46345 is a medium-severity authentication bypass vulnerability in auth0-extensions auth0-account-link-extension, published on 1 May 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Auth0 Account Link Extension is an extension aimed to help link accounts easily. Versions 2.3.4 to 2.6.6 do not verify the signature of the provided JWT. This allows the user the ability to supply a forged token and the potential to access user information without proper authorization. This issue has been patched in versions 2.6.7, 2.7.0, and 3.0.0. It is recommended to upgrade to version 3.0.0 or greater.
Weakness: CWE-290
Which versions are affected by CVE-2025-46345?
How do I fix CVE-2025-46345?
No fix has been published for CVE-2025-46345 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-2025-46345 being exploited?
There is no known exploitation of CVE-2025-46345 in the wild and no public exploit code.