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Vulnerability record · CVE-2020-13920 · published 10 September 2020

CVE-2020-13920: Apache activemq missing authentication for critical function vulnerability

Apache · Activemq

Apache ActiveMQ uses LocateRegistry.createRegistry() to create the JMX RMI registry and binds the server to the "jmxrmi" entry. It is possible to connect to the registry without authentication and call the rebind method to rebind jmxrmi to something else. If an attacker creates another server to proxy the original, and bound that, he effectively becomes a man in the middle and is able to intercept the credentials when an user connects. Upgrade to Apache ActiveMQ 5.15.12.

5.9 CVSS 3.1 Medium EPSS 4.5% · top 8.7% CWE-306 · Missing authentication for critical function
5.9CVSS 3.1 base score, v2 4.3
4.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
12References
17 Jun 2026Last modified by NVD

Description

Apache ActiveMQ uses LocateRegistry.createRegistry() to create the JMX RMI registry and binds the server to the "jmxrmi" entry. It is possible to connect to the registry without authentication and call the rebind method to rebind jmxrmi to something else. If an attacker creates another server to proxy the original, and bound that, he effectively becomes a man in the middle and is able to intercept the credentials when an user connects. Upgrade to Apache ActiveMQ 5.15.12.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

4 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://activemq.apache.org/security-advisories.data/CVE-2020-13920-announcement.txt Vendor Advisory
https://lists.apache.org/thread.html/r946488fb942fd35c6a6e0359f52504a558ed438574a8f14d36d7dcd7%40%3Ccommits.activemq.apa
https://lists.apache.org/thread.html/rb2fd3bf2dce042e0ab3f3c94c4767c96bb2e7e6737624d63162df36d%40%3Ccommits.activemq.apa
https://lists.debian.org/debian-lts-announce/2020/10/msg00013.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2023/11/msg00013.html
https://www.oracle.com/security-alerts/cpuoct2020.html Third Party Advisory
http://activemq.apache.org/security-advisories.data/CVE-2020-13920-announcement.txt Vendor Advisory
https://lists.apache.org/thread.html/r946488fb942fd35c6a6e0359f52504a558ed438574a8f14d36d7dcd7%40%3Ccommits.activemq.apa
https://lists.apache.org/thread.html/rb2fd3bf2dce042e0ab3f3c94c4767c96bb2e7e6737624d63162df36d%40%3Ccommits.activemq.apa
https://lists.debian.org/debian-lts-announce/2020/10/msg00013.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2023/11/msg00013.html
https://www.oracle.com/security-alerts/cpuoct2020.html Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2020-13920), CISA KEV, FIRST EPSS (scores of 2026-10-01). This page is refreshed as NVD updates the record.