Falhas do tipo CWE-434

3.233 resultados

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-2025-6058CRITICALWPBookit <= 1.0.4 - Unauthenticated Arbitrary File UploadEPSS 6.2%CVE-2020-20969HIGHFile Upload vulnerability in PluckCMS v.4.7.10 allows a remote attacker to execute arbitrary code via the trashcan_restoreitem.php file.EPSS 6.2%CVE-2024-2561MEDIUM74CMS Company Logo Index.php#sendCompanyLogo unrestricted uploadEPSS 6.1%CVE-2021-37608—Arbitrary file upload vulnerability in OFBizEPSS 6.0%CVE-2025-3515HIGHDrag and Drop Multiple File Upload for Contact Form 7 <= 1.3.8.9 - Unauthenticated Arbitrary File Upload via Insufficient Blacklist ChecksEPSS 6.0%CVE-2023-5144MEDIUMD-Link DAR-7000/DAR-8000 updateos.php unrestricted uploadEPSS 6.0%CVE-2023-0455HIGHUnrestricted Upload of File with Dangerous Type in unilogies/bumsysEPSS 5.7%CVE-2024-2667CRITICALInstaWP Connect – 1-click WP Staging & Migration <= 0.1.0.22 - Unauthenticated Arbitrary File UploadEPSS 5.7%CVE-2024-0300MEDIUMByzoro Smart S150 Management Platform HTTP POST Request userattestation.php unrestricted uploadEPSS 5.7%CVE-2026-53787CRITICALAmasty Order Attributes for Magento 2 < 4.0.0 Unauthenticated Arbitrary File UploadEPSS 5.6%CVE-2022-44384HIGHAn arbitrary file upload vulnerability in rconfig v3.9.6 allows attackers to execute arbitrary code via a crafted PHP file.EPSS 5.6%CVE-2026-21877CRITICALn8n is vulnerable to Remote Code Execution via Arbitrary File WriteEPSS 5.4%CVE-2015-10137CRITICALWebsite Contact Form With File Upload <= 1.3.4 - Arbitrary File UploadEPSS 5.4%CVE-2021-4449CRITICALZoomSounds <= 5.96 - Unauthenticated Arbitrary File UploadEPSS 5.4%CVE-2020-24407CRITICALArbitrary code execution via file import functionalityEPSS 5.3%CVE-2021-36741HIGHAn improper input validation vulnerability in Trend Micro Apex One, Apex One as a Service, OfficeScan XG, and Worry-Free Business Security 1EPSS 5.0%KEVCVE-2026-1306CRITICALmidi-Synth <= 1.1.0 - Unauthenticated Arbitrary File Upload via 'export' AJAX ActionEPSS 4.8%CVE-2012-10020CRITICALFoxyPress <= 0.4.2.1 - Arbitrary File UploadEPSS 4.8%CVE-2021-39151HIGHXStream is vulnerable to an Arbitrary Code Execution attackEPSS 4.7%CVE-2021-39147HIGHXStream is vulnerable to an Arbitrary Code Execution attackEPSS 4.7%