Falhas do tipo CWE-434

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Upload irrestrito de arquivo com tipo perigoso

A aplicação aceita upload de arquivos sem validar adequadamente o tipo ou extensão, permitindo que um atacante envie executáveis, scripts ou outros arquivos maliciosos que serão armazenados ou executados no servidor. O risco aumenta se o arquivo for salvo em diretório acessível pela web ou em local onde será processado automaticamente.

Exemplo

Um sistema de upload de 'fotos de perfil' verifica apenas o tamanho do arquivo, mas não valida a extensão. Um atacante envia um arquivo .php disfarçado de imagem; se salvo em /uploads/ acessível via web, ele consegue executar código PHP no servidor ao acessar a URL direta.

Como mitigar

Valide extensões contra uma lista branca (whitelist) de tipos permitidos, verifique a assinatura do arquivo (magic bytes) e não confie apenas no Content-Type do cliente. Armazene uploads fora do diretório web ou configure o servidor para não executar scripts no diretório de uploads.

CVE-2025-6085HIGHMake Connector <= 1.5.10 - Authenticated (Administrator+) Arbitrary File UploadEPSS 1.2%CVE-2024-3521MEDIUMByzoro Smart S80 Management Platform userattestation.php unrestricted uploadEPSS 1.2%CVE-2022-2111CRITICALUnrestricted Upload of File with Dangerous Type in inventree/inventreeEPSS 1.2%CVE-2023-39463HIGHTriangle MicroWorks SCADA Data Gateway Trusted Certification Unrestricted Upload of File Remote Code Execution VulnerabilityEPSS 1.2%CVE-2024-29387HIGHprojeqtor up to 11.2.0 was discovered to contain a remote code execution (RCE) vulnerability via the component /view/print.php.EPSS 1.2%CVE-2024-28441CRITICALFile Upload vulnerability in magicflue v.7.0 and before allows a remote attacker to execute arbitrary code via a crafted request to the messEPSS 1.2%CVE-2023-1713HIGHBitrix24 Remote Command Execution (RCE) via Insecure Temporary File CreationEPSS 1.2%CVE-2026-1358CRITICALAirleader Master Unrestricted Upload of File with Dangerous TypeEPSS 1.2%CVE-2026-23698HIGHVtiger CRM 8.4.0 Authenticated RCE via Module Import File UploadEPSS 1.2%CVE-2023-28409CRITICALUnrestricted upload of file with dangerous type exists in MW WP Form versions v4.4.2 and earlier, which may allow a remote unauthenticated aEPSS 1.2%CVE-2024-34555CRITICALWordPress Z-Downloads plugin <= 1.11.3 - Auth. Arbitrary File Upload vulnerabilityEPSS 1.2%CVE-2022-22375HIGHIBM Security Verify Privilege command executionEPSS 1.2%CVE-2009-20006CRITICALosCommerce <= 2.2 Admin File Manager Arbitrary PHP Code ExecutionEPSS 1.2%CVE-2024-9849HIGHReal3D Flipbook Lite – 3D FlipBook, PDF Viewer, PDF Embedder <= 4.8 - Authenticated (Author+) Arbitrary File UploadEPSS 1.2%CVE-2025-8297HIGHIncomplete restriction of configuration in Ivanti Avalanche before version 6.4.8.8008 allows a remote authenticated attacker with admin privEPSS 1.2%CVE-2023-6219HIGHBookingPress <= 1.0.76 - Authenticated (Administrator+) Arbitrary File UploadEPSS 1.2%CVE-2024-1069HIGHContact Form Entries <= 1.3.2 - Authenticated (Administrator+) Arbitrary File UploadEPSS 1.2%CVE-2020-20588HIGHFile upload vulnerability in function upload in action/Core.class.php in zhimengzhe iBarn 1.5 allows remote attackers to run arbitrary code EPSS 1.2%CVE-2022-50907HIGHe107 CMS v3.2.1 - Admin Upload Restriction Bypass + RCEEPSS 1.2%CVE-2022-3125—Frontend File Manager < 21.3 - Subscriber+ Arbitrary File UploadEPSS 1.2%