{"id":"CVE-2017-2773","url":"https://www.cyber-defence.io/tools/cve/CVE-2017-2773","generatedAt":"2026-10-28T19:03:43.405Z","title":"Incomplete validation logic in JSON Web Token (JWT) libraries can allow unprivileged attackers to impersonate other users in multiple components included in PCF Elastic Runtime, aka an \"Unauthenticated JWT signing algorithm in multiple components\" issue.","description":"An issue was discovered in Pivotal PCF Elastic Runtime 1.6.x versions prior to 1.6.60, 1.7.x versions prior to 1.7.41, 1.8.x versions prior to 1.8.23, and 1.9.x versions prior to 1.9.1. Incomplete validation logic in JSON Web Token (JWT) libraries can allow unprivileged attackers to impersonate other users in multiple components included in PCF Elastic Runtime, aka an \"Unauthenticated JWT signing algorithm in multiple components\" issue.","published":"2017-06-13T06:29:00.000Z","lastModified":"2026-06-17T01:16:49.000Z","status":"Modified","sourceIdentifier":"security_alert@emc.com","cvss":{"version":"3.0","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-20"],"affected":["pivotal software/cloud foundry elastic runtime"],"epss":{"score":0.02129,"percentile":0.81854,"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 (2.13%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"http://www.securityfocus.com/bid/97135","tags":["Third Party Advisory","VDB Entry"],"source":"security_alert@emc.com"},{"url":"https://pivotal.io/security/cve-2017-2773","tags":["Mitigation","Vendor Advisory"],"source":"security_alert@emc.com"},{"url":"http://www.securityfocus.com/bid/97135","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://pivotal.io/security/cve-2017-2773","tags":["Mitigation","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2017-2773","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."}