How severe is CVE-2019-16929?

CVE-2019-16929 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2019-16929 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-16929?

CVE-2019-16929 affects Auth0 Auth0.net. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-16929?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2019-16929 published?

CVE-2019-16929 was published on 2019-10-08 and last updated on 2026-06-17.

CVE-2019-16929

CVE-2019-16929 is a high-severity vulnerability in Auth0 Auth0.net with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (55th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Auth0 Auth0.net
Published: 2019-10-08
Last modified: 2026-06-17

Description

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

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 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2019-16929 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-16929?: CVE-2019-16929 affects Auth0 Auth0.net. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-16929?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2019-16929 published?: CVE-2019-16929 was published on 2019-10-08 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:auth0:auth0.net:*:*:*:*:*:*:*:*

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