{"id":"CVE-2020-35591","url":"https://www.cyber-defence.io/tools/cve/CVE-2020-35591","generatedAt":"2026-10-27T23:27:02.848Z","title":"Pi-hole 5.0, 5.1, and 5.1.1 allows Session Fixation.","description":"Pi-hole 5.0, 5.1, and 5.1.1 allows Session Fixation. The application does not generate a new session cookie after the user is logged in. A malicious user is able to create a new session cookie value and inject it to a victim. After the victim logs in, the injected cookie becomes valid, giving the attacker access to the user's account through the active session.","published":"2021-02-18T20:15:12.000Z","lastModified":"2026-06-17T03:14:00.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":5.4,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N"},"cwe":["CWE-384"],"affected":["pi-hole/pi-hole"],"epss":{"score":0.0114,"percentile":0.6641,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (1.14%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://discourse.pi-hole.net/c/announcements/5","tags":["Release Notes","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://n4nj0.github.io/advisories/pi-hole-multiple-vulnerabilities-i/","tags":["Exploit","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://discourse.pi-hole.net/c/announcements/5","tags":["Release Notes","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://n4nj0.github.io/advisories/pi-hole-multiple-vulnerabilities-i/","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-35591","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."}