Security advisory

{
  "id": "fb1a46292c104e7b1182ca0bb1eb4834539b39cfb689a90e862cc291e3cfabce",
  "url": "https://osv.dev/vulnerability/CVE-2021-32689",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-32689",
    "summary": "Nextcloud Talk is a fully on-premises audio/video and chat communication service. In versions prior to 11.2.2, if a user was able to reuse an earlier used username, they could get access to any chat message sent to the previous user with this username. The issue was patched in versions 11.2.2 and 11.3.0. As a workaround, don't allow users to choose usernames themselves. This is the default behaviour of Nextcloud, but some user providers may allow doing so.",
    "evidence": "osv:CVE-2021-32689",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-32689",
      "aliases": [
        "CVE-2021-32689",
        "GHSA-xv6f-344w-895c"
      ],
      "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/nextcloud/spreed",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1d3c90d7121cd06c6a4c7bd23729eac9fbf595f5"
                },
                {
                  "fixed": "bb5f07315e95e18cf770f9390c812ddecf1f7cc9"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:nextcloud:talk:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "11.2.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "1d3c90d7121cd06c6a4c7bd23729eac9fbf595f5"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v11.2.2"
                  },
                  {
                    "range": [
                      {
                        "fixed": "bb5f07315e95e18cf770f9390c812ddecf1f7cc9"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v11.3.0"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v11.2.1",
            "v11.1.2",
            "v11.2.0",
            "v11.1.1",
            "v11.0.0",
            "v11.1.0",
            "v11.0.0-rc.1",
            "v11.0.0-alpha.4",
            "v11.0.0-alpha.3",
            "v11.0.0-alpha.2",
            "v11.0.0-alpha.1",
            "v10.0.0-rc.1",
            "v10.0.0-beta.2",
            "v10.0.0-beta.1",
            "v9.0.0-beta.1",
            "v8.0.0",
            "v8.0.0-alpha.6",
            "v8.0.0-alpha.5",
            "v8.0.0-alpha.4",
            "v8.0.0-alpha.3",
            "v8.0.0-alpha.2",
            "v8.0.0-alpha.1",
            "v7.0.0-beta.1",
            "v6.0.0-rc.2",
            "v6.0.0-rc.1",
            "v5.99.10",
            "v4.99.5",
            "v4.0.0",
            "v3.99.12",
            "v3.99.11",
            "v3.99.10",
            "v3.99.8",
            "v3.0.1",
            "v3.0.0",
            "v2.9.1",
            "v2.9.0",
            "v2.0.0",
            "v1.2",
            "v1.1.2",
            "v1.0.22",
            "v1.0.21"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-32689.json"
          }
        }
      ],
      "modified": "2026-10-24T10:47:44.755917076Z",
      "provider": "osv",
      "references": [
        "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xv6f-344w-895c",
        "https://github.com/nextcloud/spreed/releases/tag/v11.2.2",
        "https://github.com/nextcloud/spreed/releases/tag/v11.3.0",
        "https://hackerone.com/reports/1200700",
        "https://github.com/nextcloud/spreed/pull/5633"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:nextcloud:talk:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "nextcloud:talk",
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "11.2.2"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2021-32689",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 441502,
  "published_at": "2021-07-12T19:15:10.127+00:00"
}