{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2023-53959 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2023-53959 yet. Limit exposure of the affected software until one is available.","what":"CVE-2023-53959 is a high-severity code injection vulnerability in filezilla-project FileZilla Client, published on 19 Dec 2025. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2023-53959 and fix it if it is affected.\n\nWhat it is: CVE-2023-53959 is a high-severity code injection vulnerability in filezilla-project FileZilla Client, published on 19 Dec 2025. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2023-53959 in the wild and no public exploit code.\n\nAffected product: filezilla-project FileZilla Client. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2023-53959/ (Markdown: https://insights.sbomify.com/CVE-2023-53959/index.md)","id":"CVE-2023-53959","markdown":"https://insights.sbomify.com/CVE-2023-53959/index.md","name":"CVE-2023-53959","record":{"aliases":["GHSA-4h23-hj4v-f4xg","UBUNTU-CVE-2023-53959"],"analysis":{"component_type":"desktop_application","fix_type":"patch","impacts":["code_execution"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"FileZilla Client","requires_auth":"low_privilege","summary":"Attackers can execute arbitrary code by placing a malicious DLL in the application directory, leading to remote code execution upon launch.","user_interaction":"not_required","vuln_class":"code_injection"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[{"product":"filezilla_client","vendor":"filezilla-project"}],"cvss":{"score":8.5,"severity":"high","source":"cna","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","version":"4.0"},"cwes":[{"id":"CWE-427","name":"Uncontrolled Search Path Element"}],"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.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"FileZilla Client 3.63.1 DLL Hijacking via Missing TextShaping.dll","id":"CVE-2023-53959","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"code_injection","year":"2023"},"n_packages":0,"n_references":3,"next":{"headline":"SOUND4 IMPACT/FIRST/PULSE/Eco v2.x SQL Injection via Authentication Bypass","id":"CVE-2023-53960"},"packages":[],"prev":{"headline":"LDAP Tool Box Self Service Password 1.5.2 Account Takeover via HTTP Host Header","id":"CVE-2023-53958"},"products":["FileZilla Client"],"published":"2025-12-19","related":[{"cvss_score":6.9,"headline":"FileZilla 3.40.0 Denial of Service via Local Search","id":"CVE-2019-25683","kev_date_added":null,"published":"2026-04-05"},{"cvss_score":6.5,"headline":"Information disclosure in n/a","id":"CVE-2022-29620","kev_date_added":null,"published":"2022-06-07"},{"cvss_score":6.3,"headline":"FileZilla Client Installer uninstall.exe unquoted search path","id":"CVE-2016-15003","kev_date_added":null,"published":"2022-07-18"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-04-07","vendors":["filezilla-project"]},"summary":"Attackers can execute arbitrary code by placing a malicious DLL in the application directory, leading to remote code execution upon launch.","url":"https://insights.sbomify.com/CVE-2023-53959/"}