Falhas do tipo CWE-303

121 resultados

Implementação incorreta de algoritmos de autenticação

Fraqueza que ocorre quando um desenvolvedor implementa mal um algoritmo de autenticação, introduzindo falhas lógicas que permitem bypass ou acesso não autorizado. Pode envolver erros na validação de credenciais, tratamento incorreto de tokens, criptografia fraca ou fluxos de autenticação vulneráveis.

Exemplo

Um sistema verifica se a senha está correta comparando strings sem usar funções de comparação seguras (timing-safe), permitindo ataques de timing onde o atacante infere a senha byte a byte observando diferenças no tempo de resposta. Ou ainda, um JWT validado apenas na estrutura, mas sem verificar a assinatura corretamente.

Como mitigar

Use bibliotecas criptográficas estabelecidas e auditadas em vez de implementar algoritmos manualmente. Faça code review rigoroso de qualquer código de autenticação, aplique testes de segurança específicos e valide contra padrões reconhecidos (OWASP, NIST) antes de ir para produção.

CVE-2023-39953MEDIUMIssuer not verified from obtained token in user_oidcEPSS 0.5%CVE-2025-61783MEDIUMPython Social Auth - Django has unsafe account associationEPSS 0.5%CVE-2026-0073HIGHIn adbd_tls_verify_cert of auth.cpp, there is a possible bypass of wireless ADB mutual authentication due to a logic error in the code. ThisEPSS 0.5%CVE-2020-37094HIGHEspoCRM 5.7.0 < 5.9.0 - Two-Factor Authentication Bypass via Auth Token Reuse Between Accounts with Identical PasswordsEPSS 0.5%CVE-2026-41053HIGHOver-inclusive team membership expansion in GitHub App authentication provider for RancherEPSS 0.5%CVE-2023-31211HIGHDisabled automation users could still authenticateEPSS 0.5%CVE-2026-43640HIGHBitwarden Server < 2026.4.1 Authentication Bypass via SCIM API KeyEPSS 0.5%CVE-2024-25157MEDIUMAuthentication bypass in GoAnywhere MFT prior to 7.6.0EPSS 0.5%CVE-2026-89077HIGHMOVEit Transfer Identity validation flaw in SFTP authenticationEPSS 0.5%CVE-2025-23046MEDIUMGLPI vulnerable to unauthorized authentication by email using the OAuthIMAP pluginEPSS 0.5%CVE-2025-12421CRITICALAccount Takeover via Code Exchange EndpointEPSS 0.4%CVE-2025-43856HIGHimmich allows account hijacking through oauth2EPSS 0.4%CVE-2025-14510CRITICALABB Ability OPTIMAX Authentication Bypass in Single-Sign OnEPSS 0.4%CVE-2024-9999MEDIUMMulti-Factor Authentication Bypass in Progress WS_FTP ServerEPSS 0.4%CVE-2024-8642MEDIUMEclipse EDC: Consumer pull transfer token validation checks not appliedEPSS 0.4%CVE-2026-73458CRITICALOn affected platforms running Arista EOS with authenticated Bidirectional Forwarding Detection (BFD) sessions configured, a specially crafted packet can cause the BFD session(s) to go down. This may result in undesirable network changes because various rouEPSS 0.4%CVE-2026-66411MEDIUMDEEBOT PRO M1 and DEEBOT PRO K1VAC incorrectly implement authentication algorithm in Websocket communications. An unauthenticated attacker EPSS 0.4%CVE-2024-10214LOWIncorrect Session Creation with Desktop SSOEPSS 0.4%CVE-2026-104939HIGHNGINX Ingress Controller vulnerabilityEPSS 0.4%CVE-2023-5627HIGHIncorrect Implementation of Authentication Algorithm VulnerabilityEPSS 0.4%