CVE-2025-46345

Auth0 Account Link Extension JWT Invalid Signature Validation

CVSS 6.9 MEDIUMEPSS 0.3%CWE-290

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 6.9EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

01 May 2025Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Affected products

auth0-extensions · auth0-account-link-extension

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References

https://github.com/auth0-extensions/auth0-account-link-extension/pull/187 https://github.com/auth0-extensions/auth0-account-link-extension/security/advisories/GHSA-j2jh-rqff-7vmg