Fallos del tipo CWE-20

5450 resultados

Validação inadequada de entrada

A aplicação recebe dados de fontes externas (usuário, API, arquivo) sem verificar se estão no formato, tamanho ou tipo esperado antes de usá-los. Isso permite que um atacante envie dados malformados ou maliciosos que podem causar erros, corrupção de dados, execução de código ou acesso não autorizado.

Ejemplo

Um formulário que aceita um número de idade sem validar se é um inteiro positivo entre 0 e 150. Um atacante envia idade=-5 ou idade='DROP TABLE users;' via SQL, e o código processa isso diretamente no banco sem sanitização, causando dano.

Cómo mitigar

Valide TODA entrada externa: verificar tipo, tamanho, formato e intervalo permitido antes de usar. Use whitelists (aceitar apenas valores conhecidos como seguros) em vez de blacklists, e aplique sanitização ou prepared statements para dados que vão em queries. Testes de entrada fuzzing também ajudam a encontrar gaps.

CVE-2025-15375MEDIUMEyouCMS arcpagelist Ajax.php unserialize deserializationEPSS 0.5%CVE-2024-47866HIGHRGW DoS attack with empty HTTP header in S3 object copyEPSS 0.4%CVE-2021-44769MEDIUMTLS Certificate Generation Function Improper Input ValidationEPSS 0.4%CVE-2025-34124HIGHHeroes of Might and Magic III .h3m Map File Buffer OverflowEPSS 0.4%CVE-2025-15284MEDIUMarrayLimit bypass in bracket notation allows DoS via memory exhaustionEPSS 0.4%CVE-2026-2898MEDIUMfunadmin Backend Endpoint AuthCloudService.php getMember deserializationEPSS 0.4%CVE-2026-85239HIGHMISP Event Template Definition Validation Bypass Allows Persistent Denial of ServiceEPSS 0.4%CVE-2026-33758CRITICALOpenBao has Reflected XSS in its OIDC authentication error messageEPSS 0.4%CVE-2020-3556HIGHCisco AnyConnect Secure Mobility Client Arbitrary Code Execution VulnerabilityEPSS 0.4%CVE-2026-8959CRITICALSandbox escape due to incorrect boundary conditions in the Widget: Win32 componentEPSS 0.4%CVE-2026-42459HIGHfree5GC: Improper Input Validation and Generation of Error Message Containing Sensitive Information in github.com/free5gc/udmEPSS 0.4%CVE-2026-40871HIGHmailcow: dockerized vulnerable to Second Order SQL Injection in quarantine category via APIEPSS 0.4%CVE-2022-34758MEDIUMA CWE-20: Improper Input Validation vulnerability exists that could cause the device watchdog function to be disabled if the attacker had acEPSS 0.4%CVE-2025-40836HIGHEricsson Indoor Connect 8855 - Improper Input Validation VulnerabilityEPSS 0.4%CVE-2026-56722MEDIUMDompdf: Local file read due to improper file path validation in SVG images encoded as data-URIEPSS 0.4%CVE-2023-39404—Vulnerability of input parameter verification in certain APIs in the window management module. Successful exploitation of this vulnerabilityEPSS 0.4%CVE-2023-39390—Vulnerability of input parameter verification in certain APIs in the window management module. Successful exploitation of this vulnerabilityEPSS 0.4%CVE-2023-39381— Input verification vulnerability in the storage module. Successful exploitation of this vulnerability may cause the device to restart.EPSS 0.4%CVE-2022-30786MEDIUMA crafted NTFS image can cause a heap-based buffer overflow in ntfs_names_full_collate in NTFS-3G through 2021.8.22.EPSS 0.4%CVE-2023-37241—Input verification vulnerability in the WMS API. Successful exploitation of this vulnerability may cause the device to restart.EPSS 0.4%