CVE-2023-53959

FileZilla Client 3.63.1 DLL Hijacking via Missing TextShaping.dll

CVSS 8.5 HIGHEPSS 0.7%CWE-427

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 8.5EPSS 0.7%KEV nãoPoC —Patch —

Lifecycle

Dec 19, 2025Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

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

Affected products

filezilla-project · FileZilla Client

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References

https://filezilla-project.org/https://www.exploit-db.com/exploits/51267 https://www.vulncheck.com/advisories/filezilla-client-dll-hijacking-via-missing-textshapingdll