{"id":"CVE-2016-4340","url":"https://www.cyber-defence.io/tools/cve/CVE-2016-4340","generatedAt":"2026-11-05T05:05:35.821Z","title":"The impersonate feature in Gitlab 8.7.0, 8.6.0 through 8.6.7, 8.5.0 through 8.5.11, 8.4.0 through 8.4.9, 8.3.0 through 8.3.8, and 8.2.0 through 8.2.4 allows remote authenticated users to \"log in\" as any other user via unspecified vectors.","description":"The impersonate feature in Gitlab 8.7.0, 8.6.0 through 8.6.7, 8.5.0 through 8.5.11, 8.4.0 through 8.4.9, 8.3.0 through 8.3.8, and 8.2.0 through 8.2.4 allows remote authenticated users to \"log in\" as any other user via unspecified vectors.","published":"2017-01-23T21:59:01.000Z","lastModified":"2026-06-17T00:47:23.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.0","score":8.8,"severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-264"],"affected":["gitlab/gitlab"],"epss":{"score":0.10143,"percentile":0.95667,"date":"2026-11-04","history":[{"date":"2026-09-21","score":0.07773,"percentile":0.94464},{"date":"2026-09-22","score":0.10143,"percentile":0.95439}]},"kev":{"listed":false},"exploits":{"count":1,"verified":false,"firstPublished":"2016-08-15","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":40236,"kind":"exploit","title":"GitLab - 'impersonate' Feature Privilege Escalation","url":"https://www.exploit-db.com/exploits/40236","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/ruby/webapps/40236.txt","file":"exploits/ruby/webapps/40236.txt","published":"2016-08-15","added":"2016-08-15","updated":"2016-08-15","author":"Kaimi","type":"webapps","platform":"ruby","port":80,"verified":false,"codes":["CVE-2016-4340"],"tags":null,"aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":null}]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 10.1%, higher than 96% of all known CVEs. Patch or mitigate before the next change window."},"changes":[{"kind":"epss","label":"EPSS jump","at":"2026-09-22T00:00:00.000Z","detail":{"to":0.10143,"from":0.07773,"percentile":0.95439},"summary":"EPSS moved from 7.8% to 10.1% probability of exploitation in the next thirty days."}],"references":[{"url":"http://packetstormsecurity.com/files/138368/GitLab-Impersonate-Privilege-Escalation.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"https://about.gitlab.com/2016/05/02/cve-2016-4340-patches/","tags":["Mitigation","Patch","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://gitlab.com/gitlab-org/gitlab-ce/issues/15548","tags":["Issue Tracking","Patch","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://www.exploit-db.com/exploits/40236/","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"http://packetstormsecurity.com/files/138368/GitLab-Impersonate-Privilege-Escalation.html","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://about.gitlab.com/2016/05/02/cve-2016-4340-patches/","tags":["Mitigation","Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://gitlab.com/gitlab-org/gitlab-ce/issues/15548","tags":["Issue Tracking","Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.exploit-db.com/exploits/40236/","tags":["Exploit","Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2016-4340","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."}