+V10.5 OIDC Client
---+V10.5.1 Verify that the client (as the relying party) mitigates ID Token replay attacks. For example, by …
---+V10.5.2 Verify that the client uniquely identifies the user from ID Token claims, usually the 'sub' claim …
---+V10.5.3 Verify that the client rejects attempts by a malicious authorization server to impersonate another …
---+V10.5.4 Verify that the client validates that the ID Token is intended to be used for that client …
---+V10.5.5 Verify that, when using OIDC back-channel logout, the relying party mitigates denial of service …

V10.5 OIDC Client

As the OIDC relying party acts as an OAuth client, the requirements from the section "OAuth Client" apply as well.

Note that the "Authentication with an Identity Provider" section in the "Authentication" chapter also contains relevant general requirements.

1. Visão geral

Título	Norma
V10.5.1 Verify that the client (as the relying party) mitigates ID Token replay attacks. For example, by …	Verify that the client (as the relying party) mitigates ID Token replay attacks. For example, by ensuring that the 'nonce' claim in the ID Token matches the 'nonce' value sent in the authentication request to the OpenID Provider (in OAuth2 refereed to as the authorization request sent to the authorization server).
V10.5.2 Verify that the client uniquely identifies the user from ID Token claims, usually the 'sub' claim …	Verify that the client uniquely identifies the user from ID Token claims, usually the 'sub' claim, which cannot be reassigned to other users (for the scope of an identity provider).
V10.5.3 Verify that the client rejects attempts by a malicious authorization server to impersonate another …	Verify that the client rejects attempts by a malicious authorization server to impersonate another authorization server through authorization server metadata. The client must reject authorization server metadata if the issuer URL in the authorization server metadata does not exactly match the pre-configured issuer URL expected by the client.
V10.5.4 Verify that the client validates that the ID Token is intended to be used for that client …	Verify that the client validates that the ID Token is intended to be used for that client (audience) by checking that the 'aud' claim from the token is equal to the 'client_id' value for the client.
V10.5.5 Verify that, when using OIDC back-channel logout, the relying party mitigates denial of service …	Verify that, when using OIDC back-channel logout, the relying party mitigates denial of service through forced logout and cross-JWT confusion in the logout flow. The client must verify that the logout token is correctly typed with a value of 'logout+jwt', contains the 'event' claim with the correct member name, and does not contain a 'nonce' claim. Note that it is also recommended to have a short expiration (e.g., 2 minutes).

1.1 Referências

1.2 Requisitos identificados

1.3 Regulamentos relacionados

2. Requisitos identificados

Requisitos
Fonte	Requisito

3. Regulamentos relacionados

Regulamentos
Fonte	Regulamentação

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- OWASP Application Security Verification Standard (ASVS) 5.0.0, Mai 2025, aus OWASP/ASVS: © 2008-2025 The OWASP Foundation, lizenziert unter CC BY-SA 4.0. Änderungen: in Abschnitte aufgeteilt und in das GRCA-Format umgewandelt, der Wortlaut unverändert. Diese Bearbeitungen stehen ebenfalls unter CC BY-SA 4.0.
- OWASP Mobile Application Security Verification Standard (MASVS) v2.1.0, Januar 2024, aus OWASP/masvs: © The OWASP Foundation, lizenziert unter CC BY-SA 4.0. Änderungen: in das GRCA-Format umgewandelt, der Wortlaut unverändert. Diese Bearbeitungen stehen ebenfalls unter CC BY-SA 4.0.
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- OWASP Mobile Application Security Testing Guide (MASTG) v2.0.0, Juni 2026, aus OWASP/mastg: © The OWASP Foundation, lizenziert unter CC BY-SA 4.0. Nur die Tests und Best Practices, ohne Codebeispiele, Bilder, Werkzeuge und Apps. Änderungen: in das GRCA-Format umgewandelt, der Wortlaut unverändert; Verweise auf andere Seiten des MASTG als Links zu mas.owasp.org; die Schwachstelle jedes Tests in der Nummerierung der MASWE v1 und mit ihr verknüpft. Diese Bearbeitungen stehen ebenfalls unter CC BY-SA 4.0.
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- OWASP Top 10:2025, aus OWASP/Top10: © 2003-2025 The OWASP® Foundation, Inc., lizenziert unter CC BY-SA 4.0. Die zehn Kategorien, ohne die Symbole. Änderungen: in das GRCA-Format umgewandelt, der Wortlaut unverändert. Diese Bearbeitungen stehen ebenfalls unter CC BY-SA 4.0. Die Namen der zugeordneten CWEs (Common Weakness Enumeration): © 2006–2026 The MITRE Corporation. MITRE erlaubt die Nutzung für Forschung, Entwicklung und kommerzielle Zwecke, wenn jede Kopie den Urheberrechtsvermerk und die Lizenz enthält; maßgeblich ist der englische Wortlaut der Lizenz oben und die CWE Terms of Use. CWE™ ist eine Marke der MITRE Corporation.