{"id":"CVE-2023-53959","aliases":["EUVD-2025-204606","GHSA-4h23-hj4v-f4xg","UBUNTU-CVE-2023-53959"],"status":"published","title":"FileZilla Client 3.63.1 DLL Hijacking via Missing TextShaping.dll","description":"FileZilla Client 3.63.1 contains a DLL hijacking vulnerability that allows attackers to execute malicious code by placing a crafted TextShaping.dll in the application directory. Attackers can generate a reverse shell payload using msfvenom and replace the missing DLL to achieve remote code execution when the application launches.","severity":{"version":"4.0","score":8.5,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00853,"percentile":0.58771,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-427"],"published":"2025-12-19T21:05:53Z","modified":"2026-10-17T12:56:26Z","affected":[{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"filezilla","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.12.0.2-1ubuntu2","3.14.1-1ubuntu1","3.15.0.2-0ubuntu1","3.15.0.2-1ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"filezilla","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.27.0~rc1-1","3.28.0-1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"filezilla","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.39.0-2","3.45.1-3","3.45.1-3build1","3.46.3-1~build1","3.46.3-1","3.46.3-1build1","3.46.3-1ubuntu0.1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"filezilla","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.52.2-3","3.56.0-1","3.56.2-1","3.57.0-1","3.57.0-1build1","3.58.0-1","3.58.0-1ubuntu0.1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"filezilla","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.65.0-3","3.66.1-2","3.66.1-3","3.66.1-3.2","3.66.1-4","3.66.4-1","3.66.4-2","3.66.5-2","3.66.5-2build1","3.66.5-2build2"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"filezilla","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.68.1-1","3.69.3-1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"filezilla","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.69.6-1","3.69.6-2","3.70.6-2","3.71.0-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"filezilla","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.69.3-1","3.69.5-1","3.69.6-1"]}],"products":[{"vendor":"filezilla-project","product":"filezilla client"},{"vendor":"filezilla-project","product":"filezilla_client"}],"references":[{"url":"https://www.exploit-db.com/exploits/51267","tags":["exploit","Exploit","Third Party Advisory","VDB Entry","report"]},{"url":"https://filezilla-project.org/","tags":["product","Product","report"]},{"url":"https://www.vulncheck.com/advisories/filezilla-client-dll-hijacking-via-missing-textshapingdll","tags":["third-party-advisory","Third Party Advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-53959"},{"url":"https://filezilla-project.org"},{"url":"https://github.com/advisories/GHSA-4h23-hj4v-f4xg"},{"url":"https://ubuntu.com/security/CVE-2023-53959","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-53959","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2023-53959","title":"FileZilla Client 3.63.1 DLL Hijacking via Missing TextShaping.dll","description":"FileZilla Client 3.63.1 contains a DLL hijacking vulnerability that allows attackers to execute malicious code by placing a crafted TextShaping.dll in the application directory. Attackers can generate a reverse shell payload using msfvenom and replace the missing DLL to achieve remote code execution when the application launches.","status":"published","published":"2025-12-19T21:05:53.305Z","modified":"2026-04-07T14:08:13.413Z","cvss":[{"version":"4.0","score":8.5,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-427"],"updated_at":"2026-11-02T14:35:31.264455Z"}],"euvd":[{"id":"EUVD-2025-204606","description":"FileZilla Client 3.63.1 contains a DLL hijacking vulnerability that allows attackers to execute malicious code by placing a crafted TextShaping.dll in the application directory. Attackers can generate a reverse shell payload using msfvenom and replace the missing DLL to achieve remote code execution when the application launches.","status":"published","published":"2025-12-19T21:05:53Z","modified":"2026-04-07T14:08:13Z","cvss":[{"version":"4.0","score":8.5,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T19:25:13.335741Z"}],"ghsa":[{"id":"GHSA-4h23-hj4v-f4xg","title":"FileZilla Client 3.63.1 contains a DLL hijacking vulnerability that allows attackers to execute...","description":"FileZilla Client 3.63.1 contains a DLL hijacking vulnerability that allows attackers to execute malicious code by placing a crafted TextShaping.dll in the application directory. Attackers can generate a reverse shell payload using msfvenom and replace the missing DLL to achieve remote code execution when the application launches.","status":"published","published":"2025-12-19T21:30:20Z","modified":"2025-12-19T21:30:31Z","cvss":[{"version":"4.0","score":8.5,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/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/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-427"],"updated_at":"2026-11-02T15:05:18.702066Z"}],"nvd":[{"id":"CVE-2023-53959","description":"FileZilla Client 3.63.1 contains a DLL hijacking vulnerability that allows attackers to execute malicious code by placing a crafted TextShaping.dll in the application directory. Attackers can generate a reverse shell payload using msfvenom and replace the missing DLL to achieve remote code execution when the application launches.","status":"published","published":"2025-12-19T21:15:53.03Z","modified":"2026-06-17T06:46:25.577Z","cvss":[{"version":"4.0","score":8.5,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/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/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-427"],"updated_at":"2026-11-02T14:09:26.50087Z"}],"osv":[{"id":"UBUNTU-CVE-2023-53959","description":"FileZilla Client 3.63.1 contains a DLL hijacking vulnerability that allows attackers to execute malicious code by placing a crafted TextShaping.dll in the application directory. Attackers can generate a reverse shell payload using msfvenom and replace the missing DLL to achieve remote code execution when the application launches.","status":"published","published":"2025-12-19T21:15:00Z","modified":"2026-10-17T12:56:26.688686104Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"},{"version":"4.0","score":8.5,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T16:54:37.827858Z"}]}}