CVE-2023-53959
Critical
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.
SeverityCritical
CVSS9.8
Exploit probability—
ProductFilezilla-project Filezilla Client
PublishedDec 19, 2025
First seenDec 19, 2025
Weakness typeCWE-427CWE-427
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| filezilla-project filezilla_client | 3.63.1 | — |
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