Security advisory

{
  "id": "6fb8e1107445af6ea53a71a30080670c2a9ae3e63682f2030ba543280ab8ab6e",
  "url": "https://osv.dev/vulnerability/CVE-2021-3811",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-3811",
    "summary": "adminlte is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')",
    "evidence": "osv:CVE-2021-3811",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-3811",
      "aliases": [
        "CVE-2021-3811"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/pi-hole/web",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "f5292a3f6adc933cfab8967f2795277a6003d0ef"
                },
                {
                  "fixed": "f526716de7bb0fd382a64bcbbb33915c926f94bb"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:pi-hole:web_interface:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "5.6"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "f526716de7bb0fd382a64bcbbb33915c926f94bb"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v5.5.1",
            "v5.5",
            "v5.4",
            "v5.3.2",
            "v5.3.1",
            "v5.3",
            "v5.2.2",
            "v5.2.1",
            "v5.2",
            "v5.1.1",
            "v5.1",
            "v5.0",
            "v4.3.3",
            "v4.3.2",
            "v4.3",
            "v4.2",
            "v4.1.1",
            "v4.1",
            "v4.0",
            "v3.3",
            "v3.2.1",
            "v3.2",
            "v3.1",
            "v3.0.1a",
            "v3.0.1",
            "v3.0",
            "v2.5.2",
            "v2.5.1",
            "v2.5",
            "v2.4",
            "v2.3.1",
            "v2.3",
            "v2.2",
            "v2.1",
            "v2.0",
            "v1.4.4.2",
            "v1.4.4.1",
            "v1.4.4",
            "v1.4.3.1a",
            "v1.4.3.1",
            "v1.4.3",
            "v1.4.2",
            "v1.4.1",
            "v1.4",
            "v1.3",
            "v1.2",
            "v1.1.7",
            "v1.1.6",
            "v1.1.5",
            "v1.1.4",
            "v1.1.3",
            "v1.1.2",
            "v1.1.1",
            "v1.1.0",
            "v1.0.0",
            "v2.2.0",
            "v2.1.2",
            "2.1.1",
            "2.1.0",
            "v2.1.0-beta",
            "v2.1.0-alpha-1",
            "v2.0.5",
            "v2.0.3",
            "v2.0.2",
            "v2.0.1",
            "v2.0.0",
            "2.0.0",
            "1.2.1",
            "1.2",
            "1.1",
            "1.0",
            "0.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-3811.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:50.833809249Z",
      "provider": "osv",
      "references": [
        "https://github.com/pi-hole/adminlte/commit/f526716de7bb0fd382a64bcbbb33915c926f94bb",
        "https://huntr.dev/bounties/fa38c61f-4043-4872-bc85-7fe5ae5cc2e8"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-3811",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 386264,
  "published_at": "2021-09-17T07:15:09.387+00:00"
}