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-2024-1035HIGHopenBI Icon.php uploadIcon unrestricted uploadEPSS 0.8%CVE-2026-65640HIGHWordPress is vulnerable to a remote code execution vulnerability via malicious Postscript file upload by an Author level user or higher. PrEPSS 0.8%CVE-2023-28170CRITICALWordPress Theme Demo Import Plugin <= 1.1.1 is vulnerable to Arbitrary File UploadEPSS 0.8%CVE-2024-42780HIGHAn Unrestricted file upload vulnerability was found in "/music/ajax.php?action=save_genre" in Kashipara Music Management System v1.0. This aEPSS 0.8%CVE-2022-45548HIGHAyaCMS v3.1.2 has an Arbitrary File Upload vulnerability.EPSS 0.8%CVE-2021-4455CRITICALWordpress Plugin Smart Product Review <= 1.0.4 - Unauthenticated Arbitrary File UploadEPSS 0.8%CVE-2024-8614CRITICALWP JobSearch <= 2.6.7 - Authenticated (Subscriber+) Arbitrary File UploadEPSS 0.8%CVE-2025-68398CRITICALWeblate has git config file overwrite vulnerability that leads to remote code executionEPSS 0.8%CVE-2023-1303MEDIUMUCMS System File Management Module fileedit.php unrestricted uploadEPSS 0.8%CVE-2024-32836CRITICALWordPress WP-Lister Lite for eBay plugin <= 3.5.11 - Arbitrary File Upload vulnerabilityEPSS 0.8%CVE-2022-0472HIGHUnrestricted Upload of File with Dangerous Type in jsdecena/laracomEPSS 0.8%CVE-2023-1484MEDIUMxzjie cms upload unrestricted uploadEPSS 0.8%CVE-2023-52044CRITICALStudio-42 eLfinder 2.1.62 is vulnerable to Remote Code Execution (RCE) as there is no restriction for uploading files with the .php8 extensiEPSS 0.8%CVE-2024-31680HIGHFile Upload vulnerability in Shibang Communications Co., Ltd. IP network intercom broadcasting system v.1.0 allows a local attacker to execuEPSS 0.8%CVE-2024-25846CRITICALIn the module "Product Catalog (CSV, Excel) Import" (simpleimportproduct) <= 6.7.0 from MyPrestaModules for PrestaShop, a guest can upload fEPSS 0.8%CVE-2020-6975—Digi International ConnectPort LTS 32 MEI, Firmware Version 1.4.3 (82002228_K 08/09/2018), bios Version 1.2. Successful exploitation of thisEPSS 0.8%CVE-2023-5919MEDIUMSourceCodester Company Website CMS Create Blog Page createblog unrestricted uploadEPSS 0.8%CVE-2024-3412CRITICALWP STAGING WordPress Backup Plugin – Migration Backup Restore <= 3.4.3 - Authenticated (Admin+) Arbitrary File UploadEPSS 0.8%CVE-2024-42778HIGHAn Unrestricted file upload vulnerability was found in "/music/ajax.php?action=save_playlist" in Kashipara Music Management System v1.0. ThiEPSS 0.8%CVE-2024-8743MEDIUMBit File Manager – 100% Free & Open Source File Manager and Code Editor for WordPress <= 6.5.7 - Authenticated (Subscriber+) Limited JavaScript File UploadEPSS 0.8%