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-2022-36285HIGHWordPress Uploading SVG, WEBP and ICO files plugin <= 1.0.1 - Authenticated Arbitrary File Upload vulnerabilityEPSS 1.2%CVE-2024-22515HIGHUnrestricted File Upload vulnerability in iSpyConnect.com Agent DVR 5.1.6.0 allows attackers to upload arbitrary files via the upload audio EPSS 1.2%CVE-2024-10820CRITICALWooCommerce Upload Files <= 84.3 - Unauthenticated Arbitrary File UploadEPSS 1.2%CVE-2022-43074CRITICALAyaCMS v3.1.2 was discovered to contain an arbitrary file upload vulnerability via the component /admin/fst_upload.inc.php. This vulnerabiliEPSS 1.2%CVE-2025-48471HIGHFreeScout Vulnerable to Arbitrary File UploadEPSS 1.2%CVE-2022-42198HIGHIn Simple Exam Reviewer Management System v1.0 the User List function suffers from insecure file upload.EPSS 1.2%CVE-2026-16236HIGHRealtyna Organic IDX plugin + WPL Real Estate <= 5.3.0 - Authenticated (Subscriber+) Arbitrary File UploadEPSS 1.2%CVE-2022-44036HIGHIn b2evolution 7.2.5, if configured with admins_can_manipulate_sensitive_files, arbitrary file upload is allowed for admins, leading to commEPSS 1.2%CVE-2026-16098CRITICALProSolution WP Client <= 2.0.10 - Unauthenticated Arbitrary File Upload via Content-Disposition Header Filename OverrideEPSS 1.2%CVE-2024-11082CRITICALTumult Hype Animations <= 1.9.15 - Authenticated (Author+) Arbitrary File Upload via hypeanimations_panel FunctionEPSS 1.2%CVE-2022-45896CRITICALPlanet eStream before 6.72.10.07 allows unauthenticated upload of arbitrary files: Choose a Video / Related Media or Upload Document. UploadEPSS 1.2%CVE-2022-42201HIGHSimple Exam Reviewer Management System v1.0 is vulnerable to Insecure file upload.EPSS 1.2%CVE-2025-34329CRITICALAudioCodes Fax/IVR Appliance <= 2.6.23 Unauthenticated Backup Upload RCE via ajaxBackupUploadFile.phpEPSS 1.2%CVE-2024-24350HIGHFile Upload vulnerability in Software Publico e-Sic Livre v.2.0 and before allows a remote attacker to execute arbitrary code via the extensEPSS 1.2%CVE-2019-1010123—MODX Revolution Gallery 1.7.0 is affected by: CWE-434: Unrestricted Upload of File with Dangerous Type. The impact is: Creating file with cuEPSS 1.2%CVE-2024-9942CRITICALWPGYM <= 67.1.0 - Unauthenticated Arbitrary File UploadEPSS 1.2%CVE-2024-49653CRITICALWordPress Portfolleo plugin <= 1.2 - Arbitrary File Upload vulnerabilityEPSS 1.2%CVE-2026-102130HIGHKiteworks Email Protection Gateway Remote Code ExecutionEPSS 1.2%CVE-2026-1358CRITICALAirleader Master Unrestricted Upload of File with Dangerous TypeEPSS 1.2%CVE-2025-4317HIGHTheGem <= 5.10.3 - Authenticated (Subscriber+) Arbitrary File UploadEPSS 1.2%