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-2025-5171MEDIUMllisoft MTA Maita Training System OpenController.java this.fileService.download unrestricted uploadEPSS 0.5%CVE-2024-52404CRITICALWordPress CF7 Reply Manager plugin <= 1.2.3 - Arbitrary File Upload vulnerabilityEPSS 0.5%CVE-2024-49331CRITICALWordPress Property Lot Management System plugin <= 4.2.38 - Arbitrary File Upload vulnerabilityEPSS 0.5%CVE-2024-50529CRITICALWordPress Training – Courses plugin <= 2.0.1 - Arbitrary File Upload vulnerabilityEPSS 0.5%CVE-2024-37420CRITICALWordPress Zita Elementor Site Library plugin <= 1.6.1 - Arbitrary Code Execution vulnerabilityEPSS 0.5%CVE-2024-52406CRITICALWordPress CSV to html plugin <= 3.26 - Arbitrary File Upload vulnerabilityEPSS 0.5%CVE-2024-52384CRITICALWordPress Sage AI: Chatbots, OpenAI GPT-4 Bulk Articles, Dalle-3 Image Generation plugin <= 2.4.9 - Arbitrary File Upload vulnerabilityEPSS 0.5%CVE-2024-48035CRITICALWordPress ACF Images Search And Insert plugin <= 1.1.4 - Arbitrary File Upload vulnerabilityEPSS 0.5%CVE-2024-52407CRITICALWordPress BasePress Migration Tools plugin <= 1.0.0 - Arbitrary File Upload vulnerabilityEPSS 0.5%CVE-2024-52400CRITICALWordPress Gallerio plugin <= 1.01 - Arbitrary File Upload vulnerabilityEPSS 0.5%CVE-2024-52405CRITICALWordPress B-Banner Slider plugin <= 1.1 - Arbitrary File Upload vulnerabilityEPSS 0.5%CVE-2024-52408CRITICALWordPress Push Notifications for WordPress by PushAssist plugin <= 3.0.8 - Arbitrary File Upload vulnerabilityEPSS 0.5%CVE-2024-49260CRITICALWordPress Limb Gallery plugin <= 1.5.7 - Arbitrary File Upload vulnerabilityEPSS 0.5%CVE-2025-9941MEDIUMCodeAstro Real Estate Management System register.php unrestricted uploadEPSS 0.5%CVE-2024-48027CRITICALWordPress External featured image from bing plugin <= 1.0.2 - Remote Code Execution (RCE) vulnerabilityEPSS 0.5%CVE-2024-52370CRITICALWordPress Hive Support – WordPress Help Desk, Live Chat & AI Chat Bot Plugin for WordPress plugin <= 1.1.1 - Arbitrary File Upload vulnerabilityEPSS 0.5%CVE-2024-52399CRITICALWordPress Writer Helper plugin <= 3.1.6 - Arbitrary File Upload vulnerabilityEPSS 0.5%CVE-2024-50480CRITICALWordPress Marketing Automation by AZEXO plugin <= 1.27.80 - Arbitrary File Upload vulnerabilityEPSS 0.5%CVE-2024-50530CRITICALWordPress Stars SMTP Mailer plugin <= 2.2.1 - Arbitrary File Upload vulnerabilityEPSS 0.5%CVE-2024-48034CRITICALWordPress Creates 3D Flipbook, PDF Flipbook plugin <= 1.2 - Arbitrary File Upload vulnerabilityEPSS 0.5%