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CVE-2019-3851

Status: ModifiedMedium (4.3)—

A vulnerability was found in moodle before versions 3.6.3 and 3.5.5. There was a link to site home within the the Boost theme's secure layout, meaning students could navigate out of the page.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (2)

Fedoraproject — FedoraMoodle — Moodle

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2019-3851",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 4,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:S/C:N/I:P/A:N",
          "authentication": "SINGLE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
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    "cvssMetricV30": [
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        "type": "Secondary",
        "source": "secalert@redhat.com",
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          "baseScore": 4.3,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 2.8
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        "source": "nvd@nist.gov",
        "cvssData": {
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  "affected": [
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      "source": "secalert@redhat.com",
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          "vendor": "[UNKNOWN]",
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          "versions": [
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            },
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              "version": "3.5.5"
            }
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        }
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  ],
  "published": "2019-03-26T18:29:00.887",
  "references": [
    {
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3851",
      "tags": [
        "Issue Tracking",
        "Patch",
        "Third Party Advisory"
      ],
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://moodle.org/mod/forum/discuss.php?d=384014#p1547746",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3851",
      "tags": [
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        "Patch",
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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      "url": "https://moodle.org/mod/forum/discuss.php?d=384014#p1547746",
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability was found in moodle before versions 3.6.3 and 3.5.5. There was a link to site home within the the Boost theme's secure layout, meaning students could navigate out of the page."
    },
    {
      "lang": "es",
      "value": "Se ha descubierto una vulnerabilidad en moodle, en versiones anteriores a la 3.6.3 y la 3.5.5. Había un enlace al inicio del sitio en la capa segura del tema de Boost, lo que significa que los estudiantes podrían navegar fuera de la página."
    }
  ],
  "lastModified": "2026-06-17T02:35:43.590",
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  "sourceIdentifier": "secalert@redhat.com"
}