{"id":"CVE-2018-15121","url":"https://www.cyber-defence.io/tools/cve/CVE-2018-15121","generatedAt":"2026-10-28T21:27:42.388Z","title":"This leaves applications vulnerable to CSRF attacks during authentication and authorization operations.","description":"An issue was discovered in Auth0 auth0-aspnet and auth0-aspnet-owin. Affected packages do not use or validate the state parameter of the OAuth 2.0 and OpenID Connect protocols. This leaves applications vulnerable to CSRF attacks during authentication and authorization operations.","published":"2018-08-29T03:29:00.000Z","lastModified":"2026-06-17T01:42:05.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.0","score":8.8,"severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},"cwe":["CWE-352"],"affected":["auth0/aspnet","auth0/aspnet-owin"],"epss":{"score":0.00486,"percentile":0.41681,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.49%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://auth0.com/docs/security/bulletins/cve-2018-15121","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://auth0.com/docs/security/bulletins/cve-2018-15121","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2018-15121","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}