Security advisory

{
  "id": "cd239efb012089ebe05336ed038693eb812996cd4b2ee086c86868b07705f434",
  "url": "https://osv.dev/vulnerability/CVE-2017-0881",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2017-0881",
    "summary": "An error in the implementation of an autosubscribe feature in the check_stream_exists route of the Zulip group chat application server before 1.4.3 allowed an authenticated user to subscribe to a private stream that should have required an invitation from an existing member to join. The issue affects all previously released versions of the Zulip server.",
    "evidence": "osv:CVE-2017-0881",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2017-0881",
      "aliases": [
        "CVE-2017-0881"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/zulip/zulip",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "a063dd3b26f7ada794e14ace0d24ea1834611446"
                },
                {
                  "fixed": "7ecda1ac8e26d8fb3725e954b2dc4723dda2255f"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:zulip:zulip_server:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.4.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "7ecda1ac8e26d8fb3725e954b2dc4723dda2255f"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.4.2",
            "1.4.1",
            "1.4.0",
            "1.3.13",
            "1.3.11",
            "1.3.10",
            "1.3.9",
            "1.3.8",
            "1.3.7",
            "1.3.6",
            "1.3.5",
            "1.3.4",
            "1.3.3",
            "1.3.2",
            "1.3.1",
            "1.3.0",
            "enterprise-1.2.0",
            "enterprise-1.1.5"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2017-0881.json"
          }
        }
      ],
      "modified": "2026-10-20T10:48:05.930937873Z",
      "provider": "osv",
      "references": [
        "https://github.com/zulip/zulip/commit/7ecda1ac8e26d8fb3725e954b2dc4723dda2255f",
        "https://groups.google.com/d/msg/zulip-announce/VyawgRuoY34/NTBwnTArGwAJ"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2017-0881",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 380033,
  "published_at": "2017-03-28T02:59:01.463+00:00"
}