CVE-2026-39878

{
  "id": "CVE-2026-39878",
  "sourceIdentifier": "[email protected]",
  "published": "2026-07-20T18:16:51.713",
  "lastModified": "2026-10-24T20:10:00.137",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Chamilo LMS versions 1.11.38 and earlier contain a stored cross-site scripting vulnerability in the user registration form that allows any unauthenticated attacker to execute arbitrary JavaScript in an administrator's browser session, leading to full platform admin account takeover. This has been patched in 1.11.40."
    },
    {
      "lang": "es",
      "value": "Las versiones 1.11.38 y anteriores de Chamilo LMS contienen una vulnerabilidad de cross-site scripting almacenado en el formulario de registro de usuarios que permite a cualquier atacante no autenticado ejecutar JavaScript arbitrario en la sesión del navegador de un administrador, lo que lleva a la toma de control total de la cuenta de administrador de la plataforma. Esto ha sido parcheado en la versión 1.11.40."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "chamilo",
          "product": "chamilo-lms",
          "versions": [
            {
              "version": "<= 1.11.38",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N",
          "baseScore": 9.3,
          "baseSeverity": "CRITICAL",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "CHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.8
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-07-20T18:54:12.217476Z",
          "id": "CVE-2026-39878",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-gcjp-f7jm-rrrg",
      "source": "[email protected]"
    },
    {
      "url": "https://vokecyber.com/research/cve-2026-39878-chamilo-lms-stored-xss",
      "source": "[email protected]"
    }
  ]
}