CVE-2020-13821 — MEDIUM (5.4)

Vulnerability Description

An issue was discovered in HiveMQ Broker Control Center 4.3.2. A crafted clientid parameter in an MQTT packet (sent to the Broker) is reflected in the client section of the management console. The attacker's JavaScript is loaded in a browser, which can lead to theft of the session and cookie of the administrator's account of the Broker.

CVSS Score

5.4

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality

LOW

Integrity

LOW

Availability

NONE

Affected Products

Vendor	Product	Versions
Hivemq	Broker Control Center	4.3.2

Related Weaknesses (CWE)

CWE-79

References

https://payatu.com/advisory/hivemq-mqtt-broker---xss-over-mqttThird Party Advisory
https://www.hivemq.com/blog/hivemq-4-3-3-released/Release NotesVendor Advisory
https://payatu.com/advisory/hivemq-mqtt-broker---xss-over-mqttThird Party Advisory
https://www.hivemq.com/blog/hivemq-4-3-3-released/Release NotesVendor Advisory

FAQ

What is CVE-2020-13821?

CVE-2020-13821 is a vulnerability with a CVSS score of 5.4 (MEDIUM). An issue was discovered in HiveMQ Broker Control Center 4.3.2. A crafted clientid parameter in an MQTT packet (sent to the Broker) is reflected in the client section of the management console. The att...

How severe is CVE-2020-13821?

CVE-2020-13821 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2020-13821?

Check the references section above for vendor advisories and patch information. Affected products include: Hivemq Broker Control Center.