VULNERABILITY INTELLIGENCE

CVE-2023-33372

CVSS score9.8 CRITICAL
EPSS probability0.77%
CISA KEVNot currently listed
Published2023-08-04
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

Connected IO v2.1.0 and prior uses a hard-coded username/password pair embedded in their device's firmware used for device communication using MQTT. An attacker who gained access to these credentials is able to connect to the MQTT broker and send messages on behalf of devices, impersonating them. in order to sign and verify JWT session tokens, allowing attackers to sign arbitrary session tokens and bypass authentication.

Weakness classification

  • CWE-798: Use of Hard-coded Credentials

Primary references