ntop ntopng up to 6.7.260716 Blacklist Management edit_blacklist.lua lists_utils.editList list_name/list_enabled/url/list_update improper authorization

Summaryinfo

A vulnerability labeled as problematic has been found in ntop ntopng up to 6.7.260716. Affected by this vulnerability is the function lists_utils.editList of the file scripts/lua/rest/v2/edit/system/edit_blacklist.lua of the component Blacklist Management. Executing a manipulation of the argument list_name/list_enabled/url/list_update can lead to improper authorization. This vulnerability is handled as CVE-2026-83621. The attack can be executed remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in ntop ntopng up to 6.7.260716. It has been declared as problematic. This vulnerability affects the function lists_utils.editList of the file scripts/lua/rest/v2/edit/system/edit_blacklist.lua of the component Blacklist Management. The manipulation of the argument list_name/list_enabled/url/list_update with an unknown input leads to a improper authorization vulnerability. The CWE definition for the vulnerability is CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. As an impact it is known to affect integrity, and availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability was named CVE-2026-83621 since 08/31/2026. The exploitation appears to be easy. The attack can be initiated remotely. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1548.002 by the MITRE ATT&CK project.

Upgrading to version 6.7.260717 eliminates this vulnerability.

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Productinfo

Vendor

• ntop

Name

• ntopng

Version

• 6.7.260716

Website

• Product: https://github.com/ntop/ntopng/

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