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CVE-2020-14321

Status: ModifiedHigh (8.8)—Exploit
Severity8.8High · CVSS 3.1
Exploitation probability16 %higher than 97% of CVEs
Active exploitationNonot in the CISA catalog
Public exploitAvailableProof of concept on GitHub (unverified) · Metasploit module (reliable, widely available exploit)

In Moodle before 3.9.1, 3.8.4, 3.7.7 and 3.5.13, teachers of a course were able to assign themselves the manager role within that course.

CVSS

Base score
8.8
Version
3.1
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days
16 %
Percentile among all scored CVEs
97
Score date
10/26/2026

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).

Public exploits

Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.

⚠️ GitHub proofs of concept are not verified: some are fake or contain malware. Never run them outside an isolated lab.

Affected technologies (1)

Moodle — Moodle

CWEs

References

Show 2 references

Raw JSON (NVD)

Show
{
  "id": "CVE-2020-14321",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 8.8,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "secalert@redhat.com",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "Moodle",
          "versions": [
            {
              "status": "affected",
              "version": "Moodle 3.9, 3.8 to 3.8.3, 3.7 to 3.7.6, 3.5 to 3.5.12 and earlier unsupported versions"
            }
          ]
        }
      ]
    }
  ],
  "published": "2022-08-16T21:15:09.447",
  "references": [
    {
      "url": "https://moodle.org/mod/forum/discuss.php?d=407393",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://moodle.org/mod/forum/discuss.php?d=407393",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "secalert@redhat.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-863"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-863"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In Moodle before 3.9.1, 3.8.4, 3.7.7 and 3.5.13, teachers of a course were able to assign themselves the manager role within that course."
    },
    {
      "lang": "es",
      "value": "En Moodle versiones anteriores a 3.9.1, 3.8.4, 3.7.7 y 3.5.13, los profesores de un curso podían asignarse a sí mismos el rol de administrador dentro de ese curso."
    }
  ],
  "lastModified": "2026-06-17T02:54:32.037",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "criteria": "cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B4E4791F-5A61-4733-A1DF-12A44ECD4C39",
              "versionEndExcluding": "3.5.13",
              "versionStartIncluding": "3.5.0"
            },
            {
              "criteria": "cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "CAC673F7-1C86-4AA4-B7AD-0FFD1D4E34F9",
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            },
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            },
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              "matchCriteriaId": "8CF8FCAA-948F-430E-A19D-C7BC09DA7D74"
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          "operator": "OR"
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  "sourceIdentifier": "secalert@redhat.com"
}