CVE-2023-53959

FileZilla Client 3.63.1 DLL Hijacking via Missing TextShaping.dll

Published Dec 19, 2025 CVSS 4.0 · 8.5 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
CPEs cpe:2.3:a:filezilla-project:filezilla_client:3.63.1:*:*:*:*:*:*:*
Type Values Removed Values Added
First Time appeared Filezilla-project
Filezilla-project filezilla Client
Vendors & Products Filezilla-project
Filezilla-project filezilla Client
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title FileZilla Client 3.63.1 DLL Hijacking via Missing TextShaping.dll
Weaknesses CWE-427
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Apr 7, 2026, 2:08 PM
Reserved
Dec 19, 2025, 2:03 PM
Status
Analyzed
Published
Dec 19, 2025, 9:15 PM
Modified
Jun 17, 2026, 6:46 AM