{"id":"CVE-2021-27182","url":"https://www.cyber-defence.io/tools/cve/CVE-2021-27182","generatedAt":"2026-10-28T02:58:46.344Z","title":"There is an IFRAME injection vulnerability in Webmail (aka WorldClient).","description":"An issue was discovered in MDaemon before 20.0.4. There is an IFRAME injection vulnerability in Webmail (aka WorldClient). It can be exploited via an email message. It allows an attacker to perform any action with the privileges of the attacked user.","published":"2021-04-14T23:15:12.000Z","lastModified":"2026-06-17T03:44:25.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-74"],"affected":["altn/mdaemon"],"epss":{"score":0.01554,"percentile":0.74975,"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":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (1.55%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://github.com/chudyPB/MDaemon-Advisories","tags":["Exploit","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://www.altn.com/Support/SecurityUpdate/MD011221_MDaemon_EN/","tags":["Release Notes","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://github.com/chudyPB/MDaemon-Advisories","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.altn.com/Support/SecurityUpdate/MD011221_MDaemon_EN/","tags":["Release Notes","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-27182","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."}