CVE-2019-16929

Name: CVE-2019-16929
Creator: NVD / NIST
Published: 2019-10-08T13:15:15.55+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.89%

Last modified Jun 17, 2026

CVE-2019-16929 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Auth0 auth0.net before 6.5.4 has Incorrect Access Control because IdentityTokenValidator can be accidentally used to validate untrusted ID tokens.. EPSS estimates a 0.89% chance of exploitation in the next 30 days.

Description

Auth0 auth0.net before 6.5.4 has Incorrect Access Control because IdentityTokenValidator can be accidentally used to validate untrusted ID tokens.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS Probability

0.89%

54.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-287

Affected Software

Vendor	Product	Versions
Auth0	Auth0.Net	>= 5.8.0, <= 6.5.3

References

https://auth0.com/docs/security/bulletins/cve-2019-16929Vendor Advisory
https://auth0.com/docs/security/bulletins/cve-2019-16929Vendor Advisory

Timeline

Published: Oct 8, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-16929?

Auth0 auth0.net before 6.5.4 has Incorrect Access Control because IdentityTokenValidator can be accidentally used to validate untrusted ID tokens.

How severe is CVE-2019-16929?

CVE-2019-16929 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.89% probability of exploitation in the next 30 days.

How do I fix CVE-2019-16929?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-16929?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST