HCL DFXServer Broken Authentication via Direct API Access

HCL DFXServer is affected by a Broken Authentication vulnerability via direct API access. The application fails to verify the user's authentication status when accessing specific API endpoints, allowing an unauthenticated attacker to interact with the APIs and perform unauthorized actions without valid credentials.

Casky was already ahead

This CVE exploits attack patterns that Casky's 283matched 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

HCL DFXServer contains a critical broken authentication vulnerability (CWE-639) that allows unauthenticated attackers to directly access and interact with specific API endpoints without valid credentials. This vulnerability is particularly dangerous because it bypasses the authentication layer entirely—a fundamental security control—giving attackers unrestricted access to perform unauthorized actions. Organizations running HCL DFXServer are at immediate risk, especially those exposing these APIs to untrusted networks. The high CVSS score of 8.2 reflects the severity: attackers can gain initial access and potentially escalate privileges without any legitimate authentication mechanism.

Casky.ai's 283 matched security skills map to MITRE ATT&CK techniques TA0004 (Privilege Escalation) and TA0006 (Credential Access), enabling practitioners to detect attack patterns through Claude's extended reasoning capabilities. When analyzing API traffic, practitioners would identify suspicious indicators: repeated 401/403 authentication responses followed by successful 200 responses without credential submission, unusual API endpoints accessed before authentication, or direct REST calls lacking Authorization headers that should fail but succeed. Casky's skill-based detection would correlate these patterns with known broken authentication signatures, flagging anomalous API access attempts, unauthorized state changes, and resource manipulation that circumvent normal authentication workflows. Practitioners reviewing findings would see clear attack chains: Initial Access via direct API calls, followed by Persistence attempts through credential manipulation or privilege escalation within the DFXServer environment.

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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 →

283 Casky skills cover this attack pattern

These skills use Claude AI's reasoning model to surface findings in the same attack categories as CVE-2026-35147.

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 TA0006

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