Weaknesses of type CWE-20

5,387 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-2016-9606—JBoss RESTEasy before version 3.1.2 could be forced into parsing a request with YamlProvider, resulting in unmarshalling of potentially untrEPSS 5.9%CVE-2018-0314—A vulnerability in the Cisco Fabric Services (CFS) component of Cisco FXOS Software and Cisco NX-OS Software could allow an unauthenticated,EPSS 5.9%CVE-2023-45648MEDIUMApache Tomcat: Trailer header parsing too lenientEPSS 5.8%CVE-2021-34994HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Commvault CommCell 11.22.22. Although authEPSS 5.8%CVE-2020-3110HIGHCisco Video Surveillance 8000 Series IP Cameras Cisco Discovery Protocol Remote Code Execution and Denial of Service VulnerabilityEPSS 5.7%CVE-2022-3140—Macro URL arbitrary script executionEPSS 5.7%CVE-2022-26531MEDIUMMultiple improper input validation flaws were identified in some CLI commands of Zyxel USG/ZyWALL series firmware versions 4.09 through 4.71EPSS 5.7%CVE-2022-39291MEDIUMDenial of service through logs in zoneminderEPSS 5.6%CVE-2020-26146MEDIUMAn issue was discovered on Samsung Galaxy S3 i9305 4.4.4 devices. The WPA, WPA2, and WPA3 implementations reassemble fragments with non-consEPSS 5.6%CVE-2018-0308—A vulnerability in the Cisco Fabric Services component of Cisco FXOS Software and Cisco NX-OS Software could allow an unauthenticated, remotEPSS 5.6%CVE-2018-0312—A vulnerability in the Cisco Fabric Services component of Cisco FXOS Software and Cisco NX-OS Software could allow an unauthenticated, remotEPSS 5.6%CVE-2017-7522—OpenVPN versions before 2.4.3 and before 2.3.17 are vulnerable to denial-of-service by authenticated remote attacker via sending a certificaEPSS 5.5%CVE-2020-15180—A flaw was found in the mysql-wsrep component of mariadb. Lack of input sanitization in `wsrep_sst_method` allows for command injection thatEPSS 5.5%CVE-2020-1747CRITICALA vulnerability was discovered in the PyYAML library in versions before 5.3.1, where it is susceptible to arbitrary code execution when it pEPSS 5.4%CVE-2025-54248HIGHAdobe Experience Manager | Improper Input Validation (CWE-20)EPSS 5.4%CVE-2019-1862HIGHCisco IOS XE Software Web UI Command Injection VulnerabilityEPSS 5.4%CVE-2023-29371HIGHWindows GDI Elevation of Privilege VulnerabilityEPSS 5.4%CVE-2024-45431MEDIUMOpenSynergy BlueSDK (aka Blue SDK) through 6.x has Improper Input Validation. The specific flaw exists within the BlueSDK Bluetooth stack. TEPSS 5.4%CVE-2020-3252CRITICALMultiple Vulnerabilities in Cisco UCS Director and Cisco UCS Director Express for Big DataEPSS 5.3%CVE-2017-12319MEDIUMA vulnerability in the Border Gateway Protocol (BGP) over an Ethernet Virtual Private Network (EVPN) for Cisco IOS XE Software could allow aEPSS 5.2%KEV