CVE-2020-13821

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.

Category

5.4
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.34%
Vendor Advisory hivemq.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://payatu.com/advisory/hivemq-mqtt-broker---xss-over-mqtt third party advisory
https://www.hivemq.com/blog/hivemq-4-3-3-released/ release notes vendor advisory

Frequently Asked Questions

What is the severity of CVE-2020-13821?
CVE-2020-13821 has been scored as a medium severity vulnerability.
How to fix CVE-2020-13821?
To fix CVE-2020-13821, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-13821 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2020-13821 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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