Critical
filezilla — security advisory
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.
- Products
- filezilla
- Affected versions
- 3.12.0.2-1ubuntu2, 3.14.1-1ubuntu1, 3.15.0.2-0ubuntu1, 3.15.0.2-1ubuntu1, 3.27.0~rc1-1, 3.28.0-1, 3.39.0-2, 3.45.1-3, 3.45.1-3build1, 3.46.3-1, 3.46.3-1build1, 3.46.3-1ubuntu0.1, 3.46.3-1~build1, 3.52.2-3, 3.56.0-1, 3.56.2-1, 3.57.0-1, 3.57.0-1build1, 3.58.0-1, 3.58.0-1ubuntu0.1, 3.65.0-3, 3.66.1-2, 3.66.1-3, 3.66.1-3.2, 3.66.1-4, 3.66.4-1, 3.66.4-2, 3.66.5-2, 3.66.5-2build1, 3.66.5-2build2, 3.68.1-1, 3.69.3-1, 3.69.5-1, 3.69.6-1, 3.69.6-2, 3.70.6-2, 3.71.0-1
- Fixed versions
- Not specified
- CVEs
- CVE-2023-53959
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 01:05 UTC · Revision 1
Source evidence
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.
osv:UBUNTU-CVE-2023-53959
filezilla
Fixed versions: Not specified
filezilla
Fixed versions: Not specified
filezilla
Fixed versions: Not specified
filezilla
Fixed versions: Not specified
filezilla
Fixed versions: Not specified
filezilla
Fixed versions: Not specified
filezilla
Fixed versions: Not specified
filezilla
Fixed versions: Not specified
Complete source record
{
"id": "f284068d1e956be4a131ee78491686552aca6062ed12e115b56902fd925a06c0",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2023-53959",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2023-53959",
"summary": "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.",
"evidence": "osv:UBUNTU-CVE-2023-53959",
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"severity": "critical",
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"aliases": [
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],
"metrics": [
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"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
},
{
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"score": "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"
},
{
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],
"modified": "2026-10-17T12:56:26.688686104Z",
"provider": "osv",
"upstream": [
"CVE-2023-53959"
],
"references": [
"https://ubuntu.com/security/CVE-2023-53959",
"https://www.cve.org/CVERecord?id=CVE-2023-53959",
"https://filezilla-project.org/",
"https://www.exploit-db.com/exploits/51267",
"https://www.vulncheck.com/advisories/filezilla-client-dll-hijacking-via-missing-textshapingdll"
]
},
"related_cves": [
{
"value": "CVE-2023-53959",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 355690,
"published_at": "2025-12-19T21:15:00+00:00"
}