High (7.5). EPSS 11% chance of exploitation in the next 30 days. Fixed in org.apache.activemq:activemq-parent 5.15.14, 5.16.1.
The optional ActiveMQ LDAP login module can be configured to use anonymous access to the LDAP server. In this case, for Apache ActiveMQ Artemis prior to version 2.16.0 and Apache ActiveMQ prior to versions 5.16.1 and 5.15.14, the anonymous context is used to verify a valid users password in error, resulting in no check on the password.
Severity
CVSS 3.1
7.5 high
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS
11% chance of exploitation in the next 30 days; higher than 95% of CVEs (scores of 2026-10-31)