CVE•Published 2025-12-19•Modified 2026-04-09•1 article on news•6 live references•NVD data
CVE-2023-53959Filezilla-project · Filezilla_client
Vulnerability data via NVD (ingested)
CVSS v3.1
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
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Weaknesses (CWE)
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.
Timeline
Published 2025-12-19
Modified 2026-04-09
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2023-53959Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product + version
product:"Filezilla-project Filezilla Client" version:"3.63.1"Version-pinned fingerprint from NVD's first vulnerable CPE.
Shodan · banner/body mention
http.html:"Filezilla Client"HTTP body or banner mentions "Filezilla Client" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2023-53959Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2023-53959Censys host search filtered to this CVE id.
grep.app
CVE-2023-53959Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2023-53959GitHub code search for direct mentions.
Google dork
"CVE-2023-53959" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2023-53959 on GitHub.