{"id":"CVE-2019-16929","aliases":["EUVD-2019-0697","GHSA-c9cg-q8r2-xvjq"],"status":"published","title":"Improper Authentication in Auth0.AuthenticationApi","description":"Auth0 auth0.net before 6.5.4 has Incorrect Access Control because IdentityTokenValidator can be accidentally used to validate untrusted ID tokens.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00891,"percentile":0.59669,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-287"],"published":"2019-10-08T12:06:31Z","modified":"2026-10-24T10:30:37Z","fixes":[{"ecosystem":"NuGet","package":"Auth0.AuthenticationApi","fixed_in":["6.5.4"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"NuGet","package":"Auth0.AuthenticationApi","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.8.0"},{"fixed":"6.5.4"}]}]},{"source":"osv","ecosystem":"NuGet","package":"Auth0.AuthenticationApi","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.8.0"},{"fixed":"6.5.4"}]}],"versions":["5.10.0","5.11.0","5.8.0","5.9.0","6.0.0","6.1.0","6.2.0","6.3.0","6.4.0","6.5.0","6.5.1","6.5.2","6.5.3"]}],"products":[{"vendor":"auth0","product":"auth0.net"}],"references":[{"url":"https://auth0.com/docs/security/bulletins/cve-2019-16929","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-16929","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-c9cg-q8r2-xvjq"}],"sources":{"cve":[{"id":"CVE-2019-16929","description":"Auth0 auth0.net before 6.5.4 has Incorrect Access Control because IdentityTokenValidator can be accidentally used to validate untrusted ID tokens.","status":"published","published":"2019-10-08T12:06:31Z","modified":"2024-08-05T01:24:48.565Z","updated_at":"2026-11-02T14:32:23.189113Z"}],"euvd":[{"id":"EUVD-2019-0697","description":"Auth0 auth0.net before 6.5.4 has Incorrect Access Control because IdentityTokenValidator can be accidentally used to validate untrusted ID tokens.","status":"published","published":"2019-10-08T12:06:31Z","modified":"2024-08-05T01:24:48Z","updated_at":"2026-11-03T02:40:31.903592Z"}],"ghsa":[{"id":"GHSA-c9cg-q8r2-xvjq","title":"Improper Authentication in Auth0.AuthenticationApi","description":"Auth0 auth0.net before 6.5.4 has Incorrect Access Control because IdentityTokenValidator can be accidentally used to validate untrusted ID tokens.","status":"published","published":"2019-10-24T20:56:12Z","modified":"2023-05-30T18:57:55Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:36:53.103029Z"}],"nvd":[{"id":"CVE-2019-16929","description":"Auth0 auth0.net before 6.5.4 has Incorrect Access Control because IdentityTokenValidator can be accidentally used to validate untrusted ID tokens.","status":"published","published":"2019-10-08T13:15:15.55Z","modified":"2026-06-17T02:22:59.23Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:05:31.019577Z"}],"osv":[{"id":"CVE-2019-16929","description":"Auth0 auth0.net before 6.5.4 has Incorrect Access Control because IdentityTokenValidator can be accidentally used to validate untrusted ID tokens.","status":"published","published":"2019-10-08T13:15:15.55Z","modified":"2026-10-24T10:30:37.854676407Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T15:44:11.673963Z"},{"id":"GHSA-c9cg-q8r2-xvjq","title":"Improper Authentication in Auth0.AuthenticationApi","description":"Auth0 auth0.net before 6.5.4 has Incorrect Access Control because IdentityTokenValidator can be accidentally used to validate untrusted ID tokens.","status":"published","published":"2019-10-24T20:56:12Z","modified":"2023-11-08T04:01:22.386634Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T15:46:44.927642Z"}]}}