CVE-2020-13821 Cross-site scripting in n/a
Reflected XSS in HiveMQ Broker Control Center allows attackers to steal administrator session cookies via crafted MQTT packets.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2020-13821?
CVE-2020-13821 is a medium-severity cross-site scripting vulnerability in n/a, published on 26 Aug 2020. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
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.
Weakness: CWE-79
Which versions are affected by CVE-2020-13821?
It affects 1 product.
Products include Hivemq Broker Control Center.
How do I fix CVE-2020-13821?
No fix has been published for CVE-2020-13821 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2020-13821 being exploited?
There is no known exploitation of CVE-2020-13821 in the wild and no public exploit code.
Sources
Also known as GHSA-9qcc-v828-vgx7.