Scope Authorization Bypass in Client Credentials Grant

The system fails to properly enforce scope authorization when the `authorize_all_scopes` configuration is enabled. This allows applications using the client credentials grant type to obtain all API scopes, including sensitive internal and console scopes, without requiring explicit authorization, bypassing intended access controls. Exploitation of this vulnerability can lead to privilege escalation, enabling unprivileged clients to perform unauthorized administrative actions, access confidential organizational data, and potentially achieve full account takeover in deployments where the `authorize_all_scopes` configuration deviates from its default disabled state.

Casky was already ahead

This CVE exploits attack patterns that Casky's 224matched skills already investigate — long before this vulnerability was disclosed. Claude's reasoning model maps these techniques to MITRE ATT&CK, so practitioners who ran these skills have already seen the threat behaviour in their findings.

Analysis

CVE-2025-11229 is a privilege escalation vulnerability affecting OAuth 2.0 implementations where the `authorize_all_scopes` configuration fails to enforce proper scope authorization boundaries. When enabled, this misconfiguration allows applications using the client credentials grant type to obtain unrestricted API access, including sensitive internal and console scopes that should remain restricted. This vulnerability is particularly dangerous because it bypasses the intended access control model—unprivileged clients can escalate their privileges to perform administrative actions they were never authorized to perform. Any organization using client credentials flows with this configuration enabled is at risk, especially those managing multi-tenant environments or exposing internal APIs to third-party integrations.

Casky's 224 mapped security skills leverage Claude AI with extended reasoning to detect the attack patterns underlying this CVE by analyzing authorization flows against MITRE ATT&CK technique TA0004 (Privilege Escalation). Practitioners using Casky would identify this vulnerability through detection of: (1) overpermissioned token issuance where client credentials requests receive scopes beyond their declared permissions, (2) access to internal or console API endpoints from applications without explicit authorization grants, and (3) configuration audits revealing `authorize_all_scopes` enabled in OAuth implementations. The platform's reasoning engine would correlate these signals—abnormal scope grants, unauthorized endpoint access, and configuration weaknesses—to surface the root cause and provide actionable remediation steps focused on implementing proper scope validation and least-privilege principles in credential-based authentication flows.

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Casky Risk Score

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EPSS Probability

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Shodan Exposure

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GreyNoise Signal

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Composite risk scoring from EPSS, CISA KEV, Shodan, and GreyNoise — 21 security APIs correlated into a single Casky Risk Score. Coming in Casky Pro. Join early access →

224 Casky skills cover this attack pattern

These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2025-11229.

abusing-dpapi-for-credential-access

red teaming · high

Run

abusing-shadow-credentials-for-privesc

red teaming · high

Run

Access with Stolen Session Cookie

identity access management · low

Run

MITRE ATT&CK Techniques

TA0004

Investigate the attack patterns behind CVE-2025-11229

Casky has 224 skills that investigate the attack patterns behind CVE-2025-11229. Run one and get CVSS-scored findings in 3 minutes.

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