CVE-2020-13946: Apache Cassandra

Medium severity, CVSS 5.9. EPSS: 3% chance of exploitation in the next 30 days.

In Apache Cassandra, all versions prior to 2.1.22, 2.2.18, 3.0.22, 3.11.8 and 4.0-beta2, it is possible for a local attacker without access to the Apache Cassandra process or configuration files to manipulate the RMI registry to perform a man-in-the-middle attack and capture user names and passwords used to access the JMX interface. The attacker can then use these credentials to access the JMX interface and perform unauthorised operations. Users should also be aware of CVE-2019-2684, a JRE vulnerability that enables this issue to be exploited remotely.

Affected products

• Apache Cassandra: before 2.1.22 (fixed in 2.1.22); from 2.2.0, before 2.2.18 (fixed in 2.2.18); from 3.0.0, before 3.0.22 (fixed in 3.0.22); from 3.11.0, before 3.11.8 (fixed in 3.11.8); version 4.0.0 only
• Netapp Oncommand Insight: affected versions not specified

Published 2020-09-01. Last modified 2026-06-17.