{"id":"CVE-2026-83621","summary":"ntopng: Missing Authorization Check in REST API Allows Non-Admin Users to Tamper Threat Intelligence Blacklist URLs","details":"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.","aliases":["GHSA-ffg5-889g-f5q8"],"modified":"2026-09-25T03:30:47.784245291Z","published":"2026-09-21T16:08:23.333Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/83xxx/CVE-2026-83621.json","unresolved_ranges":[{"extracted_events":[{"fixed":"6.7.260717"}],"source":"AFFECTED_FIELD"}],"cna_assigner":"GitHub_M","cwe_ids":["CWE-862"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/83xxx/CVE-2026-83621.json"},{"type":"ADVISORY","url":"https://github.com/ntop/ntopng/security/advisories/GHSA-ffg5-889g-f5q8"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-83621"},{"type":"FIX","url":"https://github.com/ntop/ntopng/commit/1d0627d802c59130c82478a4eb7f14014064eae5"},{"type":"FIX","url":"https://github.com/ntop/ntopng/commit/669589fe208fc932fe40a840e0de8e4d9df6023f"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/ntop/ntopng","events":[{"introduced":"0"},{"fixed":"1d0627d802c59130c82478a4eb7f14014064eae5"},{"fixed":"669589fe208fc932fe40a840e0de8e4d9df6023f"}],"database_specific":{"source":"REFERENCES"}}],"versions":["6.6","3.0","2.4"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-83621.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H"}]}