Weaknesses of type CWE-20

5,392 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-2018-8867—In GE PACSystems RX3i CPE305/310 version 9.20 and prior, RX3i CPE330 version 9.21 and prior, RX3i CPE 400 version 9.30 and prior, PACSystemsEPSS 3.4%CVE-2024-20733MEDIUM[ZS-VR-23-360] Adobe Acrobat Reader Parsing OTF font Denial-of-Service VulnerabilityEPSS 3.4%CVE-2019-1754HIGHCisco IOS XE Software Privilege Escalation VulnerabilityEPSS 3.4%CVE-2019-1755MEDIUMCisco IOS XE Software Command Injection VulnerabilityEPSS 3.4%CVE-2025-55692HIGHWindows Error Reporting Service Elevation of Privilege VulnerabilityEPSS 3.4%CVE-2018-0239—A vulnerability in the egress packet processing functionality of the Cisco StarOS operating system for Cisco Aggregation Services Router (ASEPSS 3.4%CVE-2020-2000HIGHPAN-OS: OS command injection and memory corruption vulnerabilityEPSS 3.4%CVE-2020-3341HIGHClamAV PDF Parsing Denial of Service VulnerabilityEPSS 3.4%CVE-2018-11615—This vulnerability allows remote attackers to deny service on vulnerable installations of npm mosca 2.8.1. Authentication is not required toEPSS 3.3%CVE-2018-0325—A vulnerability in the Session Initiation Protocol (SIP) call-handling functionality of Cisco IP Phone 7800 Series phones and Cisco IP PhoneEPSS 3.3%CVE-2018-0280—A vulnerability in the Real-Time Transport Protocol (RTP) bitstream processing of the Cisco Meeting Server could allow an unauthenticated, rEPSS 3.3%CVE-2018-10929HIGHA flaw was found in RPC request using gfs2_create_req in glusterfs server. An authenticated attacker could use this flaw to create arbitraryEPSS 3.3%CVE-2025-34100CRITICALBuilderEngine 3.5.0 RCE via Unauthenticated Arbitrary File UploadEPSS 3.3%CVE-2025-34115HIGHOP5 Monitor <= 7.1.9 Authenticated Command Execution via command_test.phpEPSS 3.3%CVE-2009-2055MEDIUMCisco IOS XR 3.4.0 through 3.8.1 allows remote attackers to cause a denial of service (session reset) via a BGP UPDATE message with an invalEPSS 3.3%KEVCVE-2020-25643—A flaw was found in the HDLC_PPP module of the Linux kernel in versions before 5.9-rc7. Memory corruption and a read overflow is caused by iEPSS 3.3%CVE-2019-9503HIGHBroadcom brcmfmac driver is vulnerable to a frame validation bypassEPSS 3.3%CVE-2019-15958HIGHCisco Prime Infrastructure and Evolved Programmable Network Manager Remote Code Execution VulnerabilityEPSS 3.3%CVE-2023-40743CRITICALApache Axis 1.x (EOL) may allow RCE when untrusted input is passed to getServiceEPSS 3.3%CVE-2019-15957HIGHCisco Small Business Routers RV016, RV042, RV042G, RV082, RV320, and RV325 Command Injection VulnerabilityEPSS 3.2%