{"id":"CVE-2010-20103","url":"https://www.cyber-defence.io/tools/cve/CVE-2010-20103","generatedAt":"2026-11-02T14:53:16.569Z","title":"A malicious backdoor was embedded in the official ProFTPD 1.3.3c source tarball distributed between November 28 and December 2, 2010.","description":"A malicious backdoor was embedded in the official ProFTPD 1.3.3c source tarball distributed between November 28 and December 2, 2010. The backdoor implements a hidden FTP command trigger that, when invoked, causes the server to execute arbitrary shell commands with root privileges. This allows remote, unauthenticated attackers to run any OS command on the FTP server host.","published":"2025-08-20T16:15:34.000Z","lastModified":"2026-07-15T02:16:56.000Z","status":"Analyzed","sourceIdentifier":"disclosure@vulncheck.com","cvss":{"version":"4.0","score":9.3,"severity":"CRITICAL","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-912"],"affected":["proftpd/proftpd"],"epss":{"score":0.13757,"percentile":0.96512,"date":"2026-11-01","history":[{"date":"2026-10-10","score":0.13661,"percentile":0.96404}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 13.8%, higher than 97% of all known CVEs. Patch or mitigate before the next change window."},"changes":[{"kind":"epss","label":"EPSS jump","at":"2026-10-10T00:00:00.000Z","detail":{"to":0.13661,"from":0.0509,"percentile":0.96404},"summary":"EPSS moved from 5.1% to 13.7% probability of exploitation in the next thirty days."}],"references":[{"url":"http://www.proftpd.org/","tags":["Product"],"source":"disclosure@vulncheck.com"},{"url":"https://advisories.checkpoint.com/defense/advisories/public/2011/cpai-2010-151.html/","tags":["Third Party Advisory"],"source":"disclosure@vulncheck.com"},{"url":"https://github.com/proftpd/proftpd","tags":["Product"],"source":"disclosure@vulncheck.com"},{"url":"https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/unix/ftp/proftpd_133c_backdoor.rb","tags":["Exploit","Third Party Advisory"],"source":"disclosure@vulncheck.com"},{"url":"https://web.archive.org/web/20111107212129/http://rsync.proftpd.org/","tags":["Release Notes"],"source":"disclosure@vulncheck.com"},{"url":"https://www.exploit-db.com/exploits/15662","tags":["Exploit","VDB Entry"],"source":"disclosure@vulncheck.com"},{"url":"https://www.exploit-db.com/exploits/16921","tags":["Exploit","VDB Entry"],"source":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/proftpd-backdoor-command-execution","tags":["Third Party Advisory"],"source":"disclosure@vulncheck.com"},{"url":"https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/unix/ftp/proftpd_133c_backdoor.rb","tags":["Exploit","Third Party Advisory"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://www.exploit-db.com/exploits/15662","tags":["Exploit","VDB Entry"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://www.exploit-db.com/exploits/16921","tags":["Exploit","VDB Entry"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2010-20103","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."}