Fallos del tipo CWE-434

3255 resultados

Upload irrestrito de arquivo com tipo perigoso

Ocorre quando a aplicação aceita upload de arquivos sem validar adequadamente o tipo ou extensão, permitindo que um atacante envie executáveis, scripts ou outros arquivos maliciosos. O risco é grave: o arquivo pode ser armazenado em local acessível pela web, executado pelo servidor, ou baixado e executado pela vítima.

Ejemplo

Um formulário de perfil aceita qualquer arquivo como 'foto', sem verificação. Alguém faz upload de um .exe ou .php; se salvo em pasta pública e com permissões erradas, o arquivo pode ser executado pelo servidor ou baixado por outros usuários.

Cómo mitigar

Valide a extensão e o tipo MIME no servidor (nunca apenas no cliente), rejeite extensões perigosas explicitamente, armazene uploads fora da raiz web ou sem permissão de execução, e considere renomear arquivos removendo extensão original. Idealmente, converta imagens para formatos seguros (PNG/JPG) após upload.

CVE-2022-2180—GREYD.SUITE < 1.2.7 - Unauthenticated File Upload to RCEEPSS 2.5%CVE-2019-10959—BD Alaris Gateway Workstation Versions, 1.1.3 Build 10, 1.1.3 MR Build 11, 1.2 Build 15, 1.3.0 Build 14, 1.3.1 Build 13, This does not impacEPSS 2.5%CVE-2023-4121MEDIUMByzoro Smart S85F Management Platform unrestricted uploadEPSS 2.5%CVE-2026-10818HIGHWPForms Pro <= 1.10.1.1 - Unauthenticated Arbitrary File Write via Chunked Upload Init/Finalize OrderingEPSS 2.5%CVE-2024-4964MEDIUMD-Link DAR-7000-40 urlblist.php unrestricted uploadEPSS 2.5%CVE-2024-4962MEDIUMD-Link DAR-7000-40 resmanage.php unrestricted uploadEPSS 2.5%CVE-2024-22393CRITICALApache Answer: Pixel Flood Attack by uploading the large pixel fileEPSS 2.5%CVE-2023-4226HIGHChamilo LMS File Upload Functionality Remote Code ExecutionEPSS 2.5%CVE-2025-0520CRITICALShowDoc < 2.8.7 Unauthenticated File Upload Remote Code ExecutionEPSS 2.4%CVE-2023-33480HIGHRemoteClinic 2.0 contains a critical vulnerability chain that can be exploited by a remote attacker with low-privileged user credentials to EPSS 2.4%CVE-2021-42839HIGHGrand Vice info Co. webopac7 - Arbitrary File UploadEPSS 2.4%CVE-2021-24222—WP-Curricul Vitea Free <= 6.3 - Unauthenticated Arbitrary File Upload to RCEEPSS 2.4%CVE-2021-35963CRITICALLearningdigital.com, Inc. Orca HCM - Unrestricted Upload of File with Dangerous TypeEPSS 2.4%CVE-2025-3835CRITICALRemote Code ExecutionEPSS 2.4%CVE-2020-7569—A CWE-434 Unrestricted Upload of File with Dangerous Type vulnerability exists in EcoStruxure Building Operation WebReports V1.9 - V3.1 thatEPSS 2.4%CVE-2017-9650—An Unrestricted Upload of File with Dangerous Type issue was discovered in Automated Logic Corporation (ALC) ALC WebCTRL, i-Vu, SiteScan WebEPSS 2.4%CVE-2024-7985HIGHFileOrganizer <= 1.0.9 - Authenticated (Subscriber+) Arbitrary File UploadEPSS 2.4%CVE-2024-1918MEDIUMByzoro Smart S42 Management Platform userattestation.php unrestricted uploadEPSS 2.3%CVE-2019-25138CRITICALUser Submitted Posts <= 20190312 - Unauthenticated Arbitrary File UploadEPSS 2.3%CVE-2016-15033CRITICALDelete All Comments <= 2.0 - Arbitrary File UploadEPSS 2.3%