Chat room membership disclosed via autocompletion in Nextcloud talk

{
  "id": "c29d964be1b04d41a6c90066cfd10c5de68e6af71f4b2b1f1af076e1b062eb2a",
  "url": "https://osv.dev/vulnerability/CVE-2023-28845",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Chat room membership disclosed via autocompletion in Nextcloud talk",
    "summary": "Nextcloud talk is a video & audio conferencing app for Nextcloud. In affected versions the talk app does not properly filter access to a conversations member list. As a result an attacker could use this vulnerability to gain information about the members of a Talk conversation, even if they themselves are not members. It is recommended that the Nextcloud Talk is upgraded to 14.0.9 or 15.0.4. There are no known workarounds for this vulnerability.",
    "evidence": "osv:CVE-2023-28845",
    "products": [],
    "severity": "low",
    "structured": {
      "id": "CVE-2023-28845",
      "aliases": [
        "CVE-2023-28845",
        "GHSA-3m6r-479j-4chf"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/nextcloud/spreed",
              "type": "GIT",
              "events": [
                {
                  "introduced": "96fdd42ed0eda2bd882753f2436ac6f06fda4a60"
                },
                {
                  "fixed": "69e83698b6d36466812c4fa571e7dcb199743354"
                },
                {
                  "introduced": "7149ff90e030daff312bf973d5c9b219e0fa6061"
                },
                {
                  "fixed": "f9740bfbf84453492843333e80691c091c0be6ea"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:nextcloud:talk:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "14.0.0"
                      },
                      {
                        "fixed": "14.0.9"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:nextcloud:talk:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "15.0.0"
                      },
                      {
                        "fixed": "15.0.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v14.0.8",
            "v15.0.3",
            "v14.0.7",
            "v15.0.2",
            "v14.0.6",
            "v15.0.1",
            "v15.0.0",
            "v14.0.5",
            "v14.0.4",
            "v14.0.3",
            "v14.0.2",
            "v14.0.1",
            "v14.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-28845.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:49.839936138Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/28xxx/CVE-2023-28845.json",
        "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-3m6r-479j-4chf",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-28845",
        "https://github.com/nextcloud/spreed/pull/8651"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-284"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/28xxx/CVE-2023-28845.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-28845",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 518507,
  "published_at": "2023-03-31T22:13:44.046+00:00"
}