{"cve_id":"CVE-2011-2523","published":"2019-11-27T21:15:12.387000+00:00","last_modified":"2026-06-16T23:31:30.717000+00:00","vuln_status":"Modified","description":"vsftpd 2.3.4 downloaded between 20110630 and 20110703 contains a backdoor which opens a shell on port 6200/tcp.","cvss_version":"3.1","cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","base_score":9.8,"base_severity":"CRITICAL","attack_vector":"NETWORK","privileges_req":"NONE","user_interaction":"NONE","scope":"UNCHANGED","impact_c":"HIGH","impact_i":"HIGH","impact_a":"HIGH","cwe_ids":["CWE-78"],"in_kev":false,"kev_date_added":null,"kev_ransomware":false,"epss_score":0.96184,"epss_percentile":0.99878,"cap_rule_version":"0.1.1","stage":"INITIAL_ACCESS","req_access":"NONE","req_vector":"NETWORK","req_user_interaction":false,"grant_access":"USER","caps":["CODE_EXEC"],"terminal":false,"cap_confidence":"high","ingested_at":"2026-09-18T09:08:40.157552+00:00","first_seen":"2019-11-27T21:15:12.387000+00:00","kev_first_seen":null,"novelty_score":0.0,"novelty_reasons":[],"novelty_at":null,"vendors":["debian","vsftpd_project"],"products":["debian_linux","vsftpd"],"affected":[{"vendor":"debian","product":"debian_linux","ranges":["8.0","9.0","10.0"]},{"vendor":"vsftpd_project","product":"vsftpd","ranges":["2.3.4"]}]}