Weaknesses of type CWE-20

5,439 results

Validação inadequada de entrada

O software recebe dados do usuário ou de fontes externas, mas não verifica ou verifica de forma incompleta se esses dados têm as propriedades necessárias para processar com segurança. Isso permite que entradas malformadas, maliciosas ou inesperadas passem por controles e causem comportamentos indevidos — desde crashes até injeção de código.

Example

Uma aplicação web recebe um parâmetro numérico via GET, mas não valida se é realmente um número inteiro válido antes de usá-lo em uma consulta SQL. Um atacante envia um valor com caracteres especiais (ex: `1' OR '1'='1`), conseguindo injetar código SQL direto no banco de dados.

How to mitigate

Implemente validação rigorosa na entrada: defina o tipo, formato, comprimento e intervalo esperados; rejeite tudo que não se encaixe. Use listas de caracteres permitidos ('whitelist'), escape de dados para o contexto específico (SQL, HTML, URL) e bibliotecas de validação consolidadas. Nunca confie em dados do cliente.

CVE-2023-21558HIGHWindows Error Reporting Service Elevation of Privilege VulnerabilityEPSS 0.5%CVE-2020-3487HIGHCisco IOS XE Wireless Controller Software for the Catalyst 9000 Family CAPWAP Denial of Service VulnerabilitiesEPSS 0.5%CVE-2026-27304CRITICALColdFusion | Improper Input Validation (CWE-20)EPSS 0.5%CVE-2026-26310MEDIUMCrash for scoped ip address in Envoy during DNSEPSS 0.5%CVE-2025-20148HIGHCisco Secure Firewall Management Center HTML Injection VulnerabilityEPSS 0.5%CVE-2024-47857CRITICALSSH Communication Security PrivX versions between 18.0-36.0 implement insufficient validation on public key signatures when using native SSHEPSS 0.5%CVE-2026-12954HIGHMapster WP Maps <= 1.23.0 - Authenticated (Subscriber+) Arbitrary User Meta Write via 'acf-photo-gallery-groups' ParameterEPSS 0.5%CVE-2025-9066HIGHRockwell Automation FactoryTalk® ViewPoint XXE to Denial-of-Service VulnerabilityEPSS 0.5%CVE-2026-49095HIGHImproper Input Validation in Kibana Fleet Leading to Privilege EscalationEPSS 0.5%CVE-2025-71007HIGHAn input validation vulnerability in the oneflow.index_add component of OneFlow v0.9.0 allows attackers to cause a Denial of Service (DoS) vEPSS 0.5%CVE-2024-32645MEDIUMvyper performs incorrect topic logging in raw_logEPSS 0.5%CVE-2026-65336MEDIUMThis issue was addressed through improved state management. This issue is fixed in Safari 26.6.1, iOS 18.7.10 and iPadOS 18.7.10, iOS 26.6.1EPSS 0.5%CVE-2020-3428HIGHCisco IOS XE Wireless Controller Software for the Catalyst 9000 Family WLAN Local Profiling Denial of Service VulnerabilityEPSS 0.5%CVE-2026-65340MEDIUMThis issue was addressed through improved state management. This issue is fixed in Safari 26.6.1, iOS 18.7.10 and iPadOS 18.7.10, iOS 26.6.1EPSS 0.5%CVE-2026-65337MEDIUMThis issue was addressed through improved state management. This issue is fixed in Safari 26.6.1, iOS 18.7.10 and iPadOS 18.7.10, iOS 26.6.1EPSS 0.5%CVE-2020-3434MEDIUMCisco AnyConnect Secure Mobility Client for Windows Denial of Service VulnerabilityEPSS 0.5%CVE-2024-50343LOWIncorrect response from Validator when input ends with `\n` in symfony/validatorEPSS 0.5%CVE-2024-32646MEDIUMvyper performs double eval of the slice args when buffer from adhoc locationsEPSS 0.5%CVE-2021-39256MEDIUMA crafted NTFS image can cause a heap-based buffer overflow in ntfs_inode_lookup_by_name in NTFS-3G < 2021.8.22.EPSS 0.5%CVE-2026-23886MEDIUMSwift W3C TraceContext has malformed HTTP header that can cause a crashEPSS 0.5%