CVE-2019-16929
Improper Authentication in Auth0.AuthenticationApi
CVE-2019-16929 is a high vulnerability (CVSS 7.5) in Auth0 Auth0.net, published October 8, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.89%, the 59th percentile. Fixed in Auth0.AuthenticationApi 6.5.4.
- Severity
- 7.5 HighCVSS 3.1, NVD
- Exploit chance
- 0.89%EPSS, 59th percentile
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
6.5.4Auth0.AuthenticationApi +1 more
Description
Auth0 auth0.net before 6.5.4 has Incorrect Access Control because IdentityTokenValidator can be accidentally used to validate untrusted ID tokens.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- High
- Availability
- None
Exploit likelihood
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
Auth0.AuthenticationApiNuGet | 5.8.0 up to 6.5.4 | 6.5.4 |
Auth0.AuthenticationApiNuGet | 5.8.0 up to 6.5.4, plus listed versions 5.10.05.11.05.9.06.0.06.1.0 Show 7 moreShow less6.2.06.3.06.4.06.5.06.5.16.5.26.5.3 | 6.5.4 |
What each source reports
NVD Score used
Auth0 auth0.net before 6.5.4 has Incorrect Access Control because IdentityTokenValidator can be accidentally used to validate untrusted ID tokens.
- Record
CVE-2019-16929- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:P/A:N - Weakness
- CWE-287
- Updated
- 2026-11-02
CVE ListNo score
Auth0 auth0.net before 6.5.4 has Incorrect Access Control because IdentityTokenValidator can be accidentally used to validate untrusted ID tokens.
- Record
CVE-2019-16929- Updated
- 2026-11-02
EUVDEUVD-2019-0697No score
Auth0 auth0.net before 6.5.4 has Incorrect Access Control because IdentityTokenValidator can be accidentally used to validate untrusted ID tokens.
- Record
EUVD-2019-0697- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-c9cg-q8r2-xvjq
Improper Authentication in Auth0.AuthenticationApi
Auth0 auth0.net before 6.5.4 has Incorrect Access Control because IdentityTokenValidator can be accidentally used to validate untrusted ID tokens.
- Record
GHSA-c9cg-q8r2-xvjq- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-287
- Updated
- 2026-11-02
OSV
Auth0 auth0.net before 6.5.4 has Incorrect Access Control because IdentityTokenValidator can be accidentally used to validate untrusted ID tokens.
- Record
CVE-2019-16929- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Updated
- 2026-11-02
OSVGHSA-c9cg-q8r2-xvjq
Improper Authentication in Auth0.AuthenticationApi
Auth0 auth0.net before 6.5.4 has Incorrect Access Control because IdentityTokenValidator can be accidentally used to validate untrusted ID tokens.
- Record
GHSA-c9cg-q8r2-xvjq- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-287
- Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.