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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| filezilla-project | FileZilla Client | 3.63.1 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | filezilla | No fix yet | — |
| Ubuntu 26.04 LTS | filezilla | No fix yet | — |
| Ubuntu 25.10 | filezilla | No fix yet | — |
| Ubuntu 24.04 LTS | filezilla | No fix yet | — |
| Ubuntu 22.04 LTS | filezilla | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | filezilla | No fix yet | — |
| Ubuntu 18.04 LTS | filezilla | No fix yet | — |
| Ubuntu 16.04 LTS | filezilla | No fix yet | — |
Advisories 1
- WID-SEC-2025-2908 FileZilla: Schwachstelle ermöglicht Codeausführung BSI CERT-Bund (WID) · Dec 21, 2025
References
- ExploitDB-51267 exploit
- Official Product Homepage product
- VulnCheck Advisory: FileZilla Client 3.63.1 DLL Hijacking via Missing TextShaping.dll third-party-advisory