Security advisory

{
  "id": "25fbcdc040e0a4a6a156fb29df6cffc9e2338a2a4746ff327de038ef0afcedc1",
  "url": "https://osv.dev/vulnerability/CVE-2021-41767",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-41767",
    "summary": "Apache Guacamole 1.3.0 and older may incorrectly include a private tunnel identifier in the non-private details of some REST responses. This may allow an authenticated user who already has permission to access a particular connection to read from or interact with another user's active use of that same connection.",
    "evidence": "osv:CVE-2021-41767",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-41767",
      "aliases": [
        "BIT-guacamole-2021-41767",
        "BIT-guacamole-server-2021-41767",
        "CVE-2021-41767"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/apache/guacamole-server",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "90e15cb70635e8d13ebdefec9262701d2179983a"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:apache:guacamole:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.3.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.3.0-RC1",
            "1.3.0",
            "0.9.9",
            "0.9.8",
            "0.9.7",
            "0.9.6",
            "0.9.5",
            "0.9.4",
            "0.9.3",
            "0.9.2",
            "0.9.1",
            "0.8.3",
            "0.9.0",
            "0.8.2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-41767.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:50.241247144Z",
      "provider": "osv",
      "references": [
        "https://lists.apache.org/thread/5l31k4jmzdsfz0xt8osrbl878gb3b7ro"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-41767",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 437186,
  "published_at": "2022-01-11T22:15:07.57+00:00"
}