Falhas do tipo CWE-434

3.244 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-2023-5489MEDIUMByzoro Smart S45F Multi-Service Secure Gateway Intelligent Management Platform uploadfile.php unrestricted uploadEPSS 2.0%CVE-2014-125126CRITICALSimple E-Document Arbitrary File Upload RCEEPSS 2.0%CVE-2026-12264HIGHAuthenticated File Write via HA Failover Config Upload leads to RCEEPSS 2.0%CVE-2009-20011CRITICALContentKeeper Web Appliance < 125.10 RCE via mimencodeEPSS 1.9%CVE-2021-22803—A CWE-434: Unrestricted Upload of File with Dangerous Type vulnerability exists that could lead to remote code execution through a number ofEPSS 1.9%CVE-2012-10036CRITICALProject Pier <= 0.8.8 Arbitrary File Upload RCEEPSS 1.9%CVE-2026-65640HIGHWordPress is vulnerable to a remote code execution vulnerability via malicious Postscript file upload by an Author level user or higher. PrEPSS 1.9%CVE-2020-3436HIGHCisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Services File Upload Denial of Service VulnerabilityEPSS 1.9%CVE-2022-42189HIGHEmlog Pro 1.6.0 plugins upload suffers from a remote code execution (RCE) vulnerability.EPSS 1.9%CVE-2022-45771HIGHAn issue in the /api/audits component of Pwndoc v0.5.3 allows attackers to escalate privileges and execute arbitrary code via uploading a crEPSS 1.9%CVE-2022-1752CRITICALUnrestricted Upload of File with Dangerous Type in polonel/trudeskEPSS 1.9%CVE-2023-33480HIGHRemoteClinic 2.0 contains a critical vulnerability chain that can be exploited by a remote attacker with low-privileged user credentials to EPSS 1.9%CVE-2021-24253—Classyfrieds <= 3.8 - Authenticated Arbitrary File Upload to RCEEPSS 1.9%CVE-2021-24224—Easy Form Builder <= 1.0 - Authenticated Arbitrary File UploadEPSS 1.9%CVE-2025-34104CRITICALPiwik Authenticated RCE via Custom Plugin UploadEPSS 1.9%CVE-2021-24171—WooCommerce Upload Files < 59.4 - Unauthenticated Arbitrary File UploadEPSS 1.9%CVE-2012-10062HIGHXAMPP WebDAV PHP Upload Authentication Bypass RCEEPSS 1.9%CVE-2022-40087CRITICALSimple College Website v1.0 was discovered to contain an arbitrary file write vulnerability via the function file_put_contents(). This vulneEPSS 1.9%CVE-2020-11011CRITICALRCE via file upload in PhprojectEPSS 1.9%CVE-2023-51444HIGHGeoServer arbitrary file upload vulnerability in REST Coverage Store APIEPSS 1.9%