XSS in Hivemq Broker Control Center
CVE-2020-13821
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.005 (43.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 43.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Hivemq Broker Control Center — versions 4.3.2
Weakness classification (CWE)
References
- payatu.com/advisory/hivemq-mqtt-broker---xss-over-mqtt (Third Party Advisory)
- www.hivemq.com/blog/hivemq-4-3-3-released/ (Release Notes, Vendor Advisory)
Frequently asked questions
- What is CVE-2020-13821?
- CVE-2020-13821 is a medium-severity vulnerability in Hivemq Broker Control Center, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2020-08-26.
- How severe is CVE-2020-13821?
- Medium severity. CVSS v3 base score is 5.4 out of 10.