Vulnerability in Filezilla-Project Filezilla Client
CVE-2023-53959
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.009 (56.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 56.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.009 · change: +0.000
Affected products
- Filezilla-Project Filezilla Client — versions 3.63.1
- Filezilla-Project Filezilla Client — versions 3.63.1
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/51267 (Exploit, VDB Entry, Third Party Advisory, exploit)
- filezilla-project.org/ (Product, product)
- www.vulncheck.com/advisories/filezilla-client-dll-hijacking-via-missing-textsha… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2023-53959?
- CVE-2023-53959 is a critical-severity vulnerability in Filezilla-Project Filezilla Client, classified under Uncontrolled Search Path Element. CVSS score: 9.8/10. Published 2025-12-19.
- How severe is CVE-2023-53959?
- Critical severity. CVSS v3 base score is 9.8 out of 10.