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CVE-2021-20788

Estado: ModificadaMedia (4.3)—

Server-side request forgery (SSRF) vulnerability in GroupSession (GroupSession Free edition from ver2.2.0 to the version prior to ver5.1.0, GroupSession byCloud from ver3.0.3 to the version prior to ver5.1.0, and GroupSession ZION from ver3.0.3 to the version prior to ver5.1.0) allows a remote authenticated attacker to conduct a port scan from the product and/or obtain information from the internal Web server.

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 (3)

Groupsession — GroupsessionGroupsession — Groupsession BycloudGroupsession — Groupsession Zion

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2021-20788",
  "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:P/I:N/A:N",
          "authentication": "SINGLE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 4.3,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "vultures@jpcert.or.jp",
      "affectedData": [
        {
          "vendor": "Japan Total System Co.,Ltd.",
          "product": "GroupSession",
          "versions": [
            {
              "status": "affected",
              "version": "GroupSession Free edition from ver2.2.0 to the version prior to ver5.1.0, GroupSession byCloud from ver3.0.3 to the version prior to ver5.1.0, and GroupSession ZION from ver3.0.3 to the version prior to ver5.1.0"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-07-30T14:15:14.867",
  "references": [
    {
      "url": "https://groupsession.jp/info/info-news/security202107",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "vultures@jpcert.or.jp"
    },
    {
      "url": "https://jvn.jp/en/jp/JVN86026700/index.html",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "vultures@jpcert.or.jp"
    },
    {
      "url": "https://groupsession.jp/info/info-news/security202107",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://jvn.jp/en/jp/JVN86026700/index.html",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-918"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Server-side request forgery (SSRF) vulnerability in GroupSession (GroupSession Free edition from ver2.2.0 to the version prior to ver5.1.0, GroupSession byCloud from ver3.0.3 to the version prior to ver5.1.0, and GroupSession ZION from ver3.0.3 to the version prior to ver5.1.0) allows a remote authenticated attacker to conduct a port scan from the product and/or obtain information from the internal Web server."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de tipo Server-side request forgery (SSRF) en GroupSession (GroupSession Free edition desde versión 2.2.0 hasta versión anterior a 5.1.0, GroupSession byCloud desde versión 3.0.3 hasta versión anterior a 5.1.0, y GroupSession ZION desde versión 3.0.3 hasta versión anterior a 5.1.0) permite a un atacante remoto autenticado conducir un escaneo de puertos desde el producto y/u obtener información del servidor Web interno"
    }
  ],
  "lastModified": "2026-06-17T03:34:27.270",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:groupsession:groupsession:*:*:*:*:free:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "BCD711A0-12D3-4FC1-B1F3-084DD5D9721B",
              "versionEndExcluding": "5.1.0",
              "versionStartIncluding": "2.20"
            },
            {
              "criteria": "cpe:2.3:a:groupsession:groupsession_bycloud:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "20139ED3-424E-49EB-9D6D-9EAA356C0D96",
              "versionEndExcluding": "5.1.0",
              "versionStartIncluding": "3.0.3"
            },
            {
              "criteria": "cpe:2.3:a:groupsession:groupsession_zion:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "9F38C4EF-470B-4C54-B57F-7C99AB59BF73",
              "versionEndExcluding": "5.1.0",
              "versionStartIncluding": "3.0.3"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "vultures@jpcert.or.jp"
}