{"id":"CVE-2020-25200","url":"https://www.cyber-defence.io/tools/cve/CVE-2020-25200","generatedAt":"2026-10-27T22:33:24.797Z","title":"Pritunl 1.29.2145.25 allows attackers to enumerate valid VPN usernames via a series of /auth/session login attempts.","description":"Pritunl 1.29.2145.25 allows attackers to enumerate valid VPN usernames via a series of /auth/session login attempts. Initially, the server will return error 401. However, if the username is valid, then after 20 login attempts, the server will start responding with error 400. Invalid usernames will receive error 401 indefinitely. Note: This has been disputed by the vendor as not a vulnerability. They argue that this is an intended design","published":"2020-10-01T18:15:13.000Z","lastModified":"2026-06-17T03:06:34.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},"cwe":["CWE-203"],"affected":["pritunl/pritunl"],"epss":{"score":0.0747,"percentile":0.94427,"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 (7.47%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://github.com/lukaszstu/pritunl/blob/master/CVE-2020-25200","tags":["Exploit","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://pritunl.com","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://pritunl.com/security","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://github.com/lukaszstu/pritunl/blob/master/CVE-2020-25200","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://pritunl.com","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://pritunl.com/security","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-25200","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."}