CVE-2026-63237

{
  "id": "CVE-2026-63237",
  "sourceIdentifier": "5f57b9bf-260d-4433-bf07-b6a79e9bb7d4",
  "published": "2026-07-29T07:16:43.133",
  "lastModified": "2026-10-23T23:10:00.157",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A TOTP two-factor authentication bypass vulnerability in\nKoollab LMS allowed an\nattacker to supply a client-controlled seed to generate a matching one-time\npassword and bypass the second authentication factor, potentially enabling\nunauthorised access to administrator accounts."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de omisión de autenticación de dos factores TOTP en Koollab LMS permitió a un atacante proporcionar una semilla controlada por el cliente para generar una contraseña de un solo uso coincidente y omitir el segundo factor de autenticación, lo que podría permitir el acceso no autorizado a cuentas de administrador."
    }
  ],
  "affected": [
    {
      "source": "5f57b9bf-260d-4433-bf07-b6a79e9bb7d4",
      "affectedData": [
        {
          "vendor": "Three Learning",
          "product": "Koollab LMS",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "5.3.2",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "5f57b9bf-260d-4433-bf07-b6a79e9bb7d4",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N",
          "baseScore": 4.8,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 2.5
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-07-29T14:29:10.771467Z",
          "id": "CVE-2026-63237",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-347"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://www.csa.gov.sg/alerts-and-advisories/alerts/al-2026-094/",
      "source": "5f57b9bf-260d-4433-bf07-b6a79e9bb7d4"
    }
  ]
}