ntopng: Missing Authorization Check in REST API Allows Non-Admin Users to Tamper Threat Intelligence Blacklist URLs

{
  "id": "90680572ef85654a9d8398731269810a604ad2cf7f23139854deb3d611121522",
  "url": "https://osv.dev/vulnerability/CVE-2026-83621",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ntopng: Missing Authorization Check in REST API Allows Non-Admin Users to Tamper Threat Intelligence Blacklist URLs",
    "summary": "ntopng is a web-based network traffic monitoring application. Prior to 6.7.260717, POST /lua/rest/v2/edit/system/edit_blacklist.lua in scripts/lua/rest/v2/edit/system/edit_blacklist.lua lacks an administrator check and calls lists_utils.editList for any authenticated user. The list_name, list_enabled, url, and list_update parameters allow a non-admin user to redirect threat-intelligence downloads to attacker-controlled content, disable blocklists, or prevent scheduled updates. The changes are persisted through Redis and reloaded without a lower-level authorization guard, undermining the integrity and availability of ntopng's threat-intelligence monitoring. This issue is fixed in version 6.7.260717.",
    "evidence": "osv:CVE-2026-83621",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-83621",
      "aliases": [
        "CVE-2026-83621",
        "GHSA-ffg5-889g-f5q8"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/ntop/ntopng",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1d0627d802c59130c82478a4eb7f14014064eae5"
                },
                {
                  "fixed": "669589fe208fc932fe40a840e0de8e4d9df6023f"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "fixed": "1d0627d802c59130c82478a4eb7f14014064eae5"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "669589fe208fc932fe40a840e0de8e4d9df6023f"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "6.6",
            "3.0",
            "2.4"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-83621.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:25.098360476Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/83xxx/CVE-2026-83621.json",
        "https://github.com/ntop/ntopng/security/advisories/GHSA-ffg5-889g-f5q8",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-83621",
        "https://github.com/ntop/ntopng/commit/1d0627d802c59130c82478a4eb7f14014064eae5",
        "https://github.com/ntop/ntopng/commit/669589fe208fc932fe40a840e0de8e4d9df6023f"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-862"
        ],
        "cna_assigner": "GitHub_M",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "6.7.260717"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StringRangeExpression"
              }
            ]
          },
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "6.7.260717"
                  },
                  {
                    "fixed": "6.7.260717"
                  }
                ],
                "source": "DESCRIPTION"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/83xxx/CVE-2026-83621.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-83621",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 491527,
  "published_at": "2026-09-21T16:08:23.333+00:00"
}