Weaknesses of type CWE-20

5,847 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-2021-25436—Improper input validation vulnerability in Tizen FOTA service prior to Firmware update JUL-2021 Release allows arbitrary code execution via EPSS 1.6%CVE-2021-21060MEDIUMAcrobat Pro DC Improper File Parsing Could Lead to Information DisclosureEPSS 1.6%CVE-2023-38254MEDIUMMicrosoft Message Queuing (MSMQ) Denial of Service VulnerabilityEPSS 1.6%CVE-2017-12218—A vulnerability in the malware detection functionality within Advanced Malware Protection (AMP) of Cisco AsyncOS Software for Cisco Email SeEPSS 1.6%CVE-2021-30004MEDIUMIn wpa_supplicant and hostapd 2.9, forging attacks may occur because AlgorithmIdentifier parameters are mishandled in tls/pkcs1.c and tls/x5EPSS 1.6%CVE-2021-1304HIGHCisco SD-WAN vManage Authorization Bypass VulnerabilitiesEPSS 1.6%CVE-2026-77537CRITICALA malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi Protect Application to EPSS 1.6%CVE-2026-77554CRITICALA malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi Talk Application to exeEPSS 1.6%CVE-2017-6021—In Schneider Electric ClearSCADA 2014 R1 (build 75.5210) and prior, 2014 R1.1 (build 75.5387) and prior, 2015 R1 (build 76.5648) and prior, EPSS 1.6%CVE-2026-77552CRITICALA malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi Enterprise Audio/Video EPSS 1.6%CVE-2021-1508CRITICALCisco SD-WAN vManage Software VulnerabilitiesEPSS 1.6%CVE-2021-1505CRITICALCisco SD-WAN vManage Software VulnerabilitiesEPSS 1.6%CVE-2022-36085HIGHOPA Compiler: Bypass of WithUnsafeBuiltins using `with` keyword to mock functionsEPSS 1.6%CVE-2026-50748CRITICALA malicious actor with access to the network and low privileges could exploit an Improper Input Validation vulnerability found in UniFi AcceEPSS 1.6%CVE-2021-21322CRITICALPrefix escapeEPSS 1.6%CVE-2026-28336CRITICALSolarWinds Dameware Command Injection VulnerabilityEPSS 1.6%CVE-2020-25717—A flaw was found in the way Samba maps domain users to local users. An authenticated attacker could use this flaw to cause possible privilegEPSS 1.6%CVE-2020-7869CRITICALAn improper input validation vulnerability of ZOOK software (remote administration tool) could allow a remote attacker to create arbitrary fEPSS 1.6%CVE-2018-10885MEDIUMIn atomic-openshift before version 3.10.9 a malicious network-policy configuration can cause Openshift Routing to crash when using ovs-netwoEPSS 1.6%CVE-2022-3294MEDIUMNode address isn't always verified when proxyingEPSS 1.6%