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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "5"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "5.30.07"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "Fullstep", "source": "cna", "vendor": "Fullstep"}, "product": "fullstep", "vendor": "fullstep"}], "analysis": {"en": {"generated_at": "2026-04-22T15:00:38.326186+00:00", "value": {"mitigation_remediation": ["Upgrade to Fullstep 5.30.07 or newer, which contains the fix for the token issuance flaw.", "Limit exposure of the registration endpoint by restricting access to trusted networks or applying IP whitelisting to reduce the opportunity for unauthenticated requests.", "Ensure that all API endpoints enforce proper authorization checks, verifying the JWT and associated scopes before granting access to protected resources."], "summary": {"action": "Immediate Patch", "impact": "Unauthorized access and potential data exposure through unauthenticated token acquisition"}, "threat_synthesis": {"affected_systems": "Fullstep\u2019s main product, versions 5.x prior to 5.30.07, are affected. The Fixed version 5.30.07, released on January 29, 2026, addresses the issue.", "description_and_impact": "Fullstep V5 contains an inadequate access control flaw that allows an unauthenticated user to register and receive a valid JSON Web Token (JWT). With this token the attacker can invoke authenticated API endpoints, thereby accessing protected resources and potentially exposing sensitive data. The vulnerability aligns with CWE\u2011306, improper authorization.", "risk_and_exploitability": "The CVSS score of 8.7 indicates a high severity. EPSS information is not available, so the exploitation probability is unknown. The vulnerability is not listed in CISA\u2019s KEV catalog. A likely attack path involves a remote web request to the registration endpoint, enabling token acquisition without authentication. Once a token is obtained, the attacker can access otherwise protected API resources, potentially compromising confidentiality of the data exposed by those endpoints."}}}}, "created": "2026-04-22T15:15:16.413316+00:00", "updated": "2026-04-27T19:55:03.449571+00:00", "vendors": ["fullstep", "fullstep$PRODUCT$fullstep"]}