CVE-2026-63238

{"id": "CVE-2026-63238", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-63238", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-29T14:24:49.887591Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "5f57b9bf-260d-4433-bf07-b6a79e9bb7d4", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 4.2, "exploitabilityScore": 2.2}]}, "affected": [{"source": "5f57b9bf-260d-4433-bf07-b6a79e9bb7d4", "affectedData": [{"vendor": "Three Learning", "product": "Koollab LMS", "versions": [{"status": "affected", "version": "5.3.2"}], "defaultStatus": "unaffected"}]}], "published": "2026-07-29T07:16:43.237", "references": [{"url": "https://www.csa.gov.sg/alerts-and-advisories/alerts/al-2026-094/", "source": "5f57b9bf-260d-4433-bf07-b6a79e9bb7d4"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-287"}]}], "descriptions": [{"lang": "en", "value": "An authentication bypass vulnerability in Koollab LMS allowed an unauthenticated\nattacker to take over any account, including administrator accounts, by\nsupplying a valid user UUID without providing primary credentials via the 2FA\nvalidation endpoint."}], "lastModified": "2026-07-30T16:54:05.457", "sourceIdentifier": "5f57b9bf-260d-4433-bf07-b6a79e9bb7d4"}