FKIE_CVE-2025-67853

Vulnerability from fkie_nvd - Published: 2026-02-03 11:15 - Updated: 2026-06-17 09:58
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Summary
A flaw was found in Moodle. A remote attacker could exploit a lack of proper rate limiting in the confirmation email service. This vulnerability allows attackers to more easily enumerate or guess user credentials, facilitating brute-force attacks against user accounts.
References
patrick@puiterwijk.orghttps://access.redhat.com/security/cve/CVE-2025-67853Third Party Advisory
patrick@puiterwijk.orghttps://bugzilla.redhat.com/show_bug.cgi?id=2423847Third Party Advisory
Impacted products
Vendor Product Version
moodle moodle *
moodle moodle *
moodle moodle *
moodle moodle *
moodle moodle 5.1.0
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://github.com/moodle/moodle/",
          "defaultStatus": "unaffected",
          "packageName": "moodle",
          "versions": [
            {
              "lessThan": "4.1.22",
              "status": "affected",
              "version": "4.1.0",
              "versionType": "semver"
            },
            {
              "lessThan": "4.4.12",
              "status": "affected",
              "version": "4.4.0",
              "versionType": "semver"
            },
            {
              "lessThan": "4.5.8",
              "status": "affected",
              "version": "4.5.0",
              "versionType": "semver"
            },
            {
              "lessThan": "5.0.4",
              "status": "affected",
              "version": "5.0.0",
              "versionType": "semver"
            },
            {
              "lessThan": "5.1.1",
              "status": "affected",
              "version": "5.1.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "patrick@puiterwijk.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "A2DF3FD1-3A53-41D9-890B-F6DE973AB09C",
              "versionEndExcluding": "4.1.22",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "CED60CDC-8F12-481C-9ADD-8559860A2B3C",
              "versionEndExcluding": "4.4.11",
              "versionStartIncluding": "4.4.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "C0CC5CF8-4808-41A5-B8A1-B0D6C575E5DC",
              "versionEndExcluding": "4.5.8",
              "versionStartIncluding": "4.5.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "06F81442-AEEB-483D-90A9-93DDBA5B95D6",
              "versionEndExcluding": "5.0.4",
              "versionStartIncluding": "5.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:moodle:moodle:5.1.0:-:*:*:*:*:*:*",
              "matchCriteriaId": "567FEE12-0E75-4F0C-B22E-E76990C80E1B",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was found in Moodle. A remote attacker could exploit a lack of proper rate limiting in the confirmation email service. This vulnerability allows attackers to more easily enumerate or guess user credentials, facilitating brute-force attacks against user accounts."
    },
    {
      "lang": "es",
      "value": "Se encontr\u00f3 un fallo en Moodle. Un atacante remoto podr\u00eda explotar una limitaci\u00f3n de tasa inadecuada en el servicio de correo electr\u00f3nico de confirmaci\u00f3n. Esta vulnerabilidad permite a los atacantes enumerar o adivinar credenciales de usuario con mayor facilidad, facilitando ataques de fuerza bruta contra cuentas de usuario."
    }
  ],
  "id": "CVE-2025-67853",
  "lastModified": "2026-06-17T09:58:11.450",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "patrick@puiterwijk.org",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-67853",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-02-03T15:43:42.458056Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-02-03T11:15:55.663",
  "references": [
    {
      "source": "patrick@puiterwijk.org",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://access.redhat.com/security/cve/CVE-2025-67853"
    },
    {
      "source": "patrick@puiterwijk.org",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2423847"
    }
  ],
  "sourceIdentifier": "patrick@puiterwijk.org",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-307"
        }
      ],
      "source": "patrick@puiterwijk.org",
      "type": "Secondary"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.