« Back to list

CVE-2017-0896

Status: ModifiedMedium (6.5)—

Zulip Server 1.5.1 and below suffer from an error in the implementation of the invite_by_admins_only setting in the Zulip group chat application server that allowed an authenticated user to invite other users to join a Zulip organization even if the organization was configured to prevent this.

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 (1)

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2017-0896",
  "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
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.0",
          "baseScore": 6.5,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "support@hackerone.com",
      "affectedData": [
        {
          "vendor": "Zulip",
          "product": "Zulip Server",
          "versions": [
            {
              "status": "affected",
              "version": "1.5.1 and below"
            }
          ]
        }
      ]
    }
  ],
  "published": "2017-06-02T17:29:00.167",
  "references": [
    {
      "url": "https://github.com/zulip/zulip/commit/1f48fa27672170bba3b9a97384905bb04c18761b",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "source": "support@hackerone.com"
    },
    {
      "url": "https://groups.google.com/forum/#%21msg/zulip-announce/sUYeJv-fFmg/2TU2TLmNAwAJ",
      "source": "support@hackerone.com"
    },
    {
      "url": "https://hackerone.com/reports/224210",
      "tags": [
        "Permissions Required"
      ],
      "source": "support@hackerone.com"
    },
    {
      "url": "https://github.com/zulip/zulip/commit/1f48fa27672170bba3b9a97384905bb04c18761b",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://groups.google.com/forum/#%21msg/zulip-announce/sUYeJv-fFmg/2TU2TLmNAwAJ",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://hackerone.com/reports/224210",
      "tags": [
        "Permissions Required"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "support@hackerone.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-285"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-862"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Zulip Server 1.5.1 and below suffer from an error in the implementation of the invite_by_admins_only setting in the Zulip group chat application server that allowed an authenticated user to invite other users to join a Zulip organization even if the organization was configured to prevent this."
    },
    {
      "lang": "es",
      "value": "Zulip Server versión 1.5.1 y posteriores, sufre de un error en la implementación de la configuración de invite_by_admins_only en el servidor de aplicaciones de chat del grupo Zulip que permitió a un usuario autenticado invitar a otros usuarios a unirse a una organización Zulip, incluso si la organización fue configurada para evitar esto."
    }
  ],
  "lastModified": "2026-06-17T00:58:28.930",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:zulip:zulip_server:1.3.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "03ECA4CD-B128-45EA-8A19-5F137BD08690"
            },
            {
              "criteria": "cpe:2.3:a:zulip:zulip_server:1.3.1:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "0609969D-7C68-4428-A2F3-EA532F6C4045"
            },
            {
              "criteria": "cpe:2.3:a:zulip:zulip_server:1.3.2:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "6141BC81-A452-44F0-9A61-B82772D406FF"
            },
            {
              "criteria": "cpe:2.3:a:zulip:zulip_server:1.3.3:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F3662F33-CC19-46AE-902F-2A685030FDE3"
            },
            {
              "criteria": "cpe:2.3:a:zulip:zulip_server:1.3.4:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "7A20311C-FC51-4ED5-BCBC-955543FD1AF5"
            },
            {
              "criteria": "cpe:2.3:a:zulip:zulip_server:1.3.6:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B4CC0654-4F8C-4D1B-B06F-035368E7B120"
            },
            {
              "criteria": "cpe:2.3:a:zulip:zulip_server:1.3.7:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "13048A35-82DA-45AF-BB3C-AEBD1A80734B"
            },
            {
              "criteria": "cpe:2.3:a:zulip:zulip_server:1.3.8:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "BE689D6F-F774-41AF-B97A-23973E22C9C9"
            },
            {
              "criteria": "cpe:2.3:a:zulip:zulip_server:1.3.9:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "7C300421-CBDE-4DC2-A41E-38AFDD498725"
            },
            {
              "criteria": "cpe:2.3:a:zulip:zulip_server:1.3.10:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "08DE09CC-3869-4686-A36D-F42788FC7118"
            },
            {
              "criteria": "cpe:2.3:a:zulip:zulip_server:1.3.11:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "8A6AAE8C-F5E6-4A9C-9AF1-0D03EB9A7E97"
            },
            {
              "criteria": "cpe:2.3:a:zulip:zulip_server:1.3.12:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "612DA887-F6BC-45F8-B187-AE23CF2F1027"
            },
            {
              "criteria": "cpe:2.3:a:zulip:zulip_server:1.3.13:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A21AE1B1-5A7E-447A-9301-1AD965F04833"
            },
            {
              "criteria": "cpe:2.3:a:zulip:zulip_server:1.4.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "034098C9-DCC3-46CC-9534-811F28F4493D"
            },
            {
              "criteria": "cpe:2.3:a:zulip:zulip_server:1.4.1:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "EA56546E-7E0A-49EB-967A-7219C907BE50"
            },
            {
              "criteria": "cpe:2.3:a:zulip:zulip_server:1.4.2:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "2CF03C39-6873-4044-96B8-760156D7B1BE"
            },
            {
              "criteria": "cpe:2.3:a:zulip:zulip_server:1.4.3:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A0167E36-42E4-4DA5-96FB-CFF0EC8FDA38"
            },
            {
              "criteria": "cpe:2.3:a:zulip:zulip_server:1.5.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "3914FE1E-E734-4B4A-8266-25FB5C32800D"
            },
            {
              "criteria": "cpe:2.3:a:zulip:zulip_server:1.5.1:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B25BEDD5-B562-4A2E-8284-07A47CB1F6D3"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "support@hackerone.com"
}