Security advisory

{
  "id": "f8ec7648ef694e140598c9a1538af9cc65d284ae9d94561096e6ab6300929a98",
  "url": "https://osv.dev/vulnerability/CVE-2020-8189",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-8189",
    "summary": "A cross-site scripting error in Nextcloud Desktop client 2.6.4 allowed to present any html (including local links) when responding with invalid data on the login attempt.",
    "evidence": "osv:CVE-2020-8189",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2020-8189",
      "aliases": [
        "CVE-2020-8189"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/nextcloud/desktop",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "adada8b2eecd65d7a587b6abe0ae2aabca9a0b75"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:nextcloud:desktop:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.6.5"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.6.4",
            "v2.6.3",
            "v2.6.2",
            "2.6.2-buildtest1",
            "v2.6.2-rc1",
            "v2.6.1",
            "v2.6.1-rc1",
            "v2.6.0-fix1",
            "v2.5.3-rc2",
            "v2.5.3-rc1",
            "v2.5.2",
            "v2.5.2-rc1",
            "v2.5.1",
            "v2.5.0",
            "v2.5.0-rc2",
            "v2.5.0-rc1",
            "v2.5.0-beta2",
            "v2.5.0-beta1",
            "v1.8.0-beta1a",
            "v1.8.0-beta1",
            "v1.6.0",
            "v1.6.0-rc3",
            "v1.6.0-rc2",
            "v1.6.0-rc1",
            "v1.6.0-beta2",
            "v1.6.0-beta1",
            "v1.5.1-rc1",
            "v1.5.0",
            "v1.5.0-beta3",
            "v1.5.0-beta1-2nd",
            "v1.5.0-beta2",
            "v1.5.0-beta1",
            "v1.4.0",
            "v1.4.0-rc1",
            "v1.4.0-beta2",
            "v1.4.0-beta1",
            "v1.3.0-beta3",
            "v1.3.0-beta2",
            "v1.3.0-beta1",
            "v1.2.5",
            "v1.2.4",
            "v1.2.3",
            "v1.2.2",
            "v1.2.1",
            "v1.2.0",
            "v1.1.2",
            "v1.1.0",
            "v1.1.0-beta1",
            "v0.0.2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-8189.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:28.385083268Z",
      "provider": "osv",
      "references": [
        "https://nextcloud.com/security/advisory/?id=NC-SA-2020-027",
        "https://security.gentoo.org/glsa/202009-09",
        "https://hackerone.com/reports/685552"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-8189",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 432032,
  "published_at": "2020-08-21T21:15:11.887+00:00"
}