Vulnerability · Published Aug 26, 2020 · Assigned by mitre

CVE-2020-13821

Medium 5.4

In plain English

A medium-severity security flaw in the affected software. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% of all known vulnerabilities).

Severity (CVSS NVD)5.4Medium

Exploit odds (30 days)0.5%top 54.8% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
n/a	n/a	n/a

References

https://payatu.com/advisory/hivemq-mqtt-broker---xss-over-mqtt x_refsource_MISC
https://www.hivemq.com/blog/hivemq-4-3-3-released/ x_refsource_CONFIRM