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CVE-2017-17454

Estado: ModificadaMedia (5.4)—

Mahara 16.10 before 16.10.7 and 17.04 before 17.04.5 and 17.10 before 17.10.2 have a Cross Site Scripting (XSS) vulnerability when a user enters invalid UTF-8 characters. These are now going to be discarded in Mahara along with NULL characters and invalid Unicode characters. Mahara will also avoid direct $_GET and $_POST usage where possible, and instead use param_exists() and the correct param_*() function to fetch the expected value.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Mahara — Mahara

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2017-17454",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 3.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:S/C:N/I:P/A:N",
          "authentication": "SINGLE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "LOW",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 6.8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.0",
          "baseScore": 5.4,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 2.7,
        "exploitabilityScore": 2.3
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2018-02-20T22:29:00.223",
  "references": [
    {
      "url": "https://bugs.launchpad.net/mahara/+bug/1732987",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://mahara.org/interaction/forum/topic.php?id=8149",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://reviews.mahara.org/#/c/8191/",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://bugs.launchpad.net/mahara/+bug/1732987",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://mahara.org/interaction/forum/topic.php?id=8149",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://reviews.mahara.org/#/c/8191/",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Mahara 16.10 before 16.10.7 and 17.04 before 17.04.5 and 17.10 before 17.10.2 have a Cross Site Scripting (XSS) vulnerability when a user enters invalid UTF-8 characters. These are now going to be discarded in Mahara along with NULL characters and invalid Unicode characters. Mahara will also avoid direct $_GET and $_POST usage where possible, and instead use param_exists() and the correct param_*() function to fetch the expected value."
    },
    {
      "lang": "es",
      "value": "Mahara 16.10 en versiones anteriores a la 16.10.7, versiones 17.04 anteriores a la 17.04.5 y versiones 17.10 anteriores a la 17.10.2 tiene una vulnerabilidad de Cross Site Scripting (XSS) cuando un usuario introduce caracteres UTF-8 no válidos. Estos serán descartados en Mahara junto con caracteres NULL y caracteres Unicode inválidos. Mahara también evitará el uso directo de $_GET y $_POST cuando sea posible; a su vez empleará param_exists() y la función correcta param_*() para recuperar el valor esperado."
    }
  ],
  "lastModified": "2026-06-17T01:10:49.253",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:mahara:mahara:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "2EC68C57-F2E1-4E20-9E38-99D3218BAC96",
              "versionEndExcluding": "16.10.7",
              "versionStartIncluding": "16.10.0"
            },
            {
              "criteria": "cpe:2.3:a:mahara:mahara:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "00BD0F18-7087-4D31-B8E0-159F79C4B13E",
              "versionEndExcluding": "17.04.5",
              "versionStartIncluding": "17.04.0"
            },
            {
              "criteria": "cpe:2.3:a:mahara:mahara:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "892E2FAA-F01B-432E-9473-774949895AD7",
              "versionEndExcluding": "17.10.2",
              "versionStartIncluding": "17.10.0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}