FileZilla Client 3.63.1 TextShaping.dll uncontrolled search path

CVSS Meta Temp Score
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CTI Interest Score
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8.1$0-$5k0.00

Summaryinfo

A vulnerability was found in FileZilla Client 3.63.1. It has been declared as problematic. This affects an unknown part in the library TextShaping.dll. Such manipulation leads to uncontrolled search path. This vulnerability is listed as CVE-2023-53959. The attack must be carried out locally. In addition, an exploit is available.

Detailsinfo

A vulnerability was found in FileZilla Client 3.63.1 and classified as critical. Affected by this issue is some unknown processing in the library TextShaping.dll. The manipulation with an unknown input leads to a uncontrolled search path vulnerability. Using CWE to declare the problem leads to CWE-427. The product uses a fixed or controlled search path to find resources, but one or more locations in that path can be under the control of unintended actors. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was presented by Bilal Qureshi as 51267. The advisory is available at exploit-db.com. This vulnerability is handled as CVE-2023-53959 since 12/19/2025. The exploitation is known to be difficult. Local access is required to approach this attack. Technical details as well as a public exploit are known. This vulnerability is assigned to T1574 by the MITRE ATT&CK project.

The exploit is available at exploit-db.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 279588 (Linux Distros Unpatched Vulnerability : CVE-2023-53959), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Exploit-DB (51267), Tenable (279588) and CERT Bund (WID-SEC-2025-2908). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • Open Source FileZilla

Productinfo

Type

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 8.4
VulDB Meta Temp Score: 8.1

VulDB Base Score: 7.0
VulDB Temp Score: 6.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 9.8
CNA Vector (VulnCheck): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Uncontrolled search path
CWE: CWE-427 / CWE-426
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 279588
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2023-53959

Exploit-DB: 🔒

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

12/19/2025 Advisory disclosed
12/19/2025 +0 days CVE reserved
12/19/2025 +0 days VulDB entry created
12/23/2025 +4 days VulDB entry last update

Sourcesinfo

Advisory: 51267
Researcher: Bilal Qureshi
Status: Not defined

CVE: CVE-2023-53959 (🔒)
GCVE (CVE): GCVE-0-2023-53959
GCVE (VulDB): GCVE-100-337658
CERT Bund: WID-SEC-2025-2908 - FileZilla: Schwachstelle ermöglicht Codeausführung

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 12/19/2025 23:02
Updated: 12/23/2025 19:51
Changes: 12/19/2025 23:02 (80), 12/22/2025 13:12 (7), 12/23/2025 19:51 (2)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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