Weaknesses of type CWE-20

5,415 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-2020-3217HIGHCisco IOS, IOS XE, IOS XR, and NX-OS Software One Platform Kit Remote Code Execution VulnerabilityEPSS 1.1%CVE-2021-44530—An injection vulnerability exists in a third-party library used in UniFi Network Version 6.5.53 and earlier (Log4J CVE-2021-44228) allows a EPSS 1.1%CVE-2023-45178MEDIUMIBM Db2 denial of serviceEPSS 1.1%CVE-2023-46167MEDIUMIBM Db2 denial of serviceEPSS 1.1%CVE-2020-3134MEDIUMCisco Email Security Appliance Zip Decompression Engine Denial of Service VulnerabilityEPSS 1.1%CVE-2023-47003CRITICALAn issue in RedisGraph v.2.12.10 allows an attacker to execute arbitrary code and cause a denial of service via a crafted string in DataBlocEPSS 1.1%CVE-2023-31149CRITICALImproper Input Validation in Web InterfaceEPSS 1.1%CVE-2023-31148CRITICALImproper Input Validation in Web InterfaceEPSS 1.1%CVE-2020-35493—A flaw exists in binutils in bfd/pef.c. An attacker who is able to submit a crafted PEF file to be parsed by objdump could cause a heap buffEPSS 1.1%CVE-2020-26185HIGHDell BSAFE Micro Edition Suite, versions prior to 4.5.1, contain a Buffer Over-Read Vulnerability.EPSS 1.1%CVE-2024-35296HIGHApache Traffic Server: Invalid Accept-Encoding can force forwarding requestsEPSS 1.1%CVE-2023-48310CRITICALAbility to DoS the testing infrastructure by overwriting filesEPSS 1.1%CVE-2023-34457MEDIUMMechanicalSoup vulnerable to malicious web server reading arbitrary files on client using file input inside HTML formEPSS 1.1%CVE-2021-21431HIGHImproper Input Validation in sopel-plugins.channelmgntEPSS 1.1%CVE-2024-40520HIGHSeaCMS 12.9 has a remote code execution vulnerability. The vulnerability is caused by admin_config_mark.php directly splicing and writing thEPSS 1.1%CVE-2020-3542MEDIUMCisco Webex Training Unauthorized Meeting Join VulnerabilityEPSS 1.1%CVE-2023-40699HIGHIBM InfoSphere Information Server denial of serviceEPSS 1.1%CVE-2024-25581HIGHTransfer requests received over DoH can lead to a denial of service in DNSdistEPSS 1.1%CVE-2018-0303—A vulnerability in the Cisco Discovery Protocol component of Cisco FXOS Software and Cisco NX-OS Software could allow an unauthenticated, adEPSS 1.1%CVE-2022-39346LOWMissing length validation of user displayname in nextcloud serverEPSS 1.1%