Uptime Kuma Stored XSS via Matomo Analytics Site ID on Public Status Pages

{
  "id": "9083375fe5e5bcfc201fa83de0d05bf5e4783e633b4d7e34c264c1a40f551e25",
  "url": "https://osv.dev/vulnerability/CVE-2026-71285",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Uptime Kuma Stored XSS via Matomo Analytics Site ID on Public Status Pages",
    "summary": "Uptime Kuma's Matomo analytics integration (server/analytics/matomo-analytics.js) injects the admin-configurable Matomo value as a bare, unquoted JavaScript expression inside a",
    "evidence": "osv:CVE-2026-71285",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-71285",
      "aliases": [
        "CVE-2026-71285"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/louislam/uptime-kuma",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "9f3b837c8c7f359ec1acee80b3c0430451986a03"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "2.4.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.4.0",
            "2.3.2",
            "2.3.1",
            "2.3.0",
            "2.2.1",
            "2.2.0",
            "2.1.3",
            "2.1.2",
            "2.1.1",
            "2.1.0",
            "2.1.0-beta.3",
            "2.1.0-beta.2",
            "2.1.0-beta.1",
            "2.1.0-beta.0",
            "2.0.0",
            "2.0.0-beta.2-temp",
            "1.23.1",
            "1.23.0",
            "1.23.0-beta.1",
            "1.23.0-beta.0",
            "1.21.2",
            "1.21.2-beta.0",
            "1.21.1",
            "1.21.0",
            "1.21.0-beta.1",
            "1.21.0-beta.0",
            "1.20.0-beta.0",
            "1.19.4",
            "1.19.3",
            "1.19.2",
            "1.19.1",
            "1.19.0",
            "1.19.0-beta.2",
            "1.19.0-beta.1",
            "1.17.1",
            "1.17.0",
            "1.17.0-beta.1",
            "1.17.0-beta.0",
            "1.16.0-beta.0",
            "1.14.0-beta.2",
            "1.14.0-beta.1",
            "1.12.1",
            "1.12.0",
            "1.11.4",
            "1.11.3",
            "1.11.2",
            "1.11.1",
            "1.11.0",
            "1.10.2",
            "1.10.1",
            "1.10.0",
            "1.9.1",
            "1.9.0",
            "1.7.0",
            "1.6.0",
            "1.3.2",
            "1.3.1",
            "1.3.0",
            "1.2.0",
            "1.1.0",
            "1.0.10",
            "1.0.9",
            "1.0.8",
            "1.0.7",
            "1.0.5",
            "1.0.4",
            "1.0.3",
            "1.0.2",
            "1.0.1",
            "1.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-71285.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:28.954907812Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71285.json",
        "https://github.com/louislam/uptime-kuma",
        "https://github.com/louislam/uptime-kuma/blob/master/server/analytics/matomo-analytics.js",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-71285"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-79"
        ],
        "cna_assigner": "TuranSec",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71285.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-71285",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 495861,
  "published_at": "2026-08-05T12:26:30.908+00:00"
}