Security advisory

{
  "id": "20ac697a3a14564cd971a618b4eff22cae7a207a3507d06f51126b5ca4445cbe",
  "url": "https://osv.dev/vulnerability/CVE-2021-43999",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-43999",
    "summary": "Apache Guacamole 1.2.0 and 1.3.0 do not properly validate responses received from a SAML identity provider. If SAML support is enabled, this may allow a malicious user to assume the identity of another Guacamole user.",
    "evidence": "osv:CVE-2021-43999",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-43999",
      "aliases": [
        "BIT-guacamole-2021-43999",
        "BIT-guacamole-server-2021-43999",
        "CVE-2021-43999"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/apache/guacamole-server",
              "type": "GIT",
              "events": [
                {
                  "introduced": "6042222d44d3b501defaff3d51be442fae710f06"
                },
                {
                  "last_affected": "90e15cb70635e8d13ebdefec9262701d2179983a"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:apache:guacamole:1.2.0:-:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.2.0-NA"
                      },
                      {
                        "last_affected": "1.2.0-NA"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "cpe": "cpe:2.3:a:apache:guacamole:1.3.0:-:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.3.0-NA"
                      },
                      {
                        "last_affected": "1.3.0-NA"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.2.0-NA",
            "1.3.0-NA"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-43999.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:33.028606424Z",
      "provider": "osv",
      "references": [
        "https://lists.apache.org/thread/4dt9h5mo4o9rxlgxm3rp8wfqdtdjn2z9"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-43999",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 433158,
  "published_at": "2022-01-11T22:15:07.627+00:00"
}