{"id":"CVE-2020-26034","url":"https://www.cyber-defence.io/tools/cve/CVE-2020-26034","generatedAt":"2026-10-28T04:17:52.664Z","title":"An account-enumeration issue was discovered in Zammad before 3.4.1.","description":"An account-enumeration issue was discovered in Zammad before 3.4.1. The Create User functionality is implemented in a way that would enable an anonymous user to guess valid user email addresses. The application responds differently depending on whether the input supplied was recognized as associated with a valid user.","published":"2020-12-28T08:15:11.000Z","lastModified":"2026-06-17T03:07:30.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":4.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"},"cwe":[],"affected":["zammad/zammad"],"epss":{"score":0.00728,"percentile":0.53994,"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":"low","text":"Lower severity and a low EPSS score (0.73%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://zammad.com/news/security-advisory-zaa-2020-14","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://zammad.com/news/security-advisory-zaa-2020-14","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-26034","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."}