Security advisory

{
  "id": "77afd88e3e3abd11be28738c415ea40c8475f5d15687e212e4c579c181face69",
  "url": "https://osv.dev/vulnerability/CVE-2021-32706",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-32706",
    "summary": "Pi-hole's Web interface provides a central location to manage a Pi-hole instance and review performance statistics. Prior to Pi-hole Web interface version 5.5.1, the `validDomainWildcard` preg_match filter allows a malicious character through that can be used to execute code, list directories, and overwrite sensitive files. The issue lies in the fact that one of the periods is not escaped, allowing any character to be used in its place. A patch for this vulnerability was released in version 5.5.1.",
    "evidence": "osv:CVE-2021-32706",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-32706",
      "aliases": [
        "CVE-2021-32706",
        "GHSA-5cm9-6p3m-v259"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/pi-hole/web",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "fb9bd561fdf936891370d85b32e899dff1dbf9d4"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:pi-hole:pi-hole:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "5.5.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "fb9bd561fdf936891370d85b32e899dff1dbf9d4"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v5.5.1"
                  }
                ]
              }
            }
          ],
          "versions": [
            "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-2021-32706.json"
          }
        }
      ],
      "modified": "2026-10-24T10:47:44.762482430Z",
      "provider": "osv",
      "references": [
        "https://github.com/pi-hole/AdminLTE/releases/tag/v5.5.1",
        "https://github.com/pi-hole/AdminLTE/security/advisories/GHSA-5cm9-6p3m-v259"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:pi-hole:pi-hole:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "pi-hole:pi-hole",
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "5.5.1"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2021-32706",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 441506,
  "published_at": "2021-08-04T18:15:09.447+00:00"
}