CVE-2020-11998

Name: CVE-2020-11998
Creator: NVD / NIST
Published: 2020-09-10T19:15:13.083+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 51.23%

Last modified Jun 17, 2026

CVE-2020-11998 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A regression has been introduced in the commit preventing JMX re-bind. By passing an empty environment map to RMIConnectorServer, instead of the map that contains the authentication credentials, it leaves ActiveMQ open to the following attack: https://docs.oracle.com/javase/8/docs/technotes/guides/management/agent.html "A remote client could create a javax.management.loading.MLet MBean and use it to create new MBeans from arbitrary URLs, at least if there is no security manager. EPSS estimates a 51.23% chance of exploitation in the next 30 days.

Description

A regression has been introduced in the commit preventing JMX re-bind. By passing an empty environment map to RMIConnectorServer, instead of the map that contains the authentication credentials, it leaves ActiveMQ open to the following attack: https://docs.oracle.com/javase/8/docs/technotes/guides/management/agent.html "A remote client could create a javax.management.loading.MLet MBean and use it to create new MBeans from arbitrary URLs, at least if there is no security manager. In other words, a rogue remote client could make your Java application execute arbitrary code." Mitigation: Upgrade to Apache ActiveMQ 5.15.13

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

51.23%

98.8th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Apache	Activemq	5.15.12
Oracle	Communications Diameter Signaling Router	>= 8.0.0, <= 8.5.0
Oracle	Communications Element Manager	>= 8.2.0, <= 8.2.4.0
Oracle	Communications Session Report Manager	>= 8.0.0, <= 8.2.2
Oracle	Communications Session Route Manager	>= 8.0.0, <= 8.2.2
Oracle	Enterprise Repository	11.1.1.7.0
Oracle	Flexcube Private Banking	12.0.0
Oracle	Flexcube Private Banking	12.1.0

References

http://activemq.apache.org/security-advisories.data/CVE-2020-11998-announcement.txtVendor Advisory
https://lists.apache.org/thread.html/r946488fb942fd35c6a6e0359f52504a558ed438574a8f14d36d7dcd7%40%3Ccommits.activemq.apache.org%3E
https://lists.apache.org/thread.html/rb2fd3bf2dce042e0ab3f3c94c4767c96bb2e7e6737624d63162df36d%40%3Ccommits.activemq.apache.org%3E
https://www.oracle.com//security-alerts/cpujul2021.htmlPatch, Third Party Advisory
https://www.oracle.com/security-alerts/cpuApr2021.htmlPatch, Third Party Advisory
https://www.oracle.com/security-alerts/cpujan2021.htmlThird Party Advisory
https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Third Party Advisory
http://activemq.apache.org/security-advisories.data/CVE-2020-11998-announcement.txtVendor Advisory
https://lists.apache.org/thread.html/r946488fb942fd35c6a6e0359f52504a558ed438574a8f14d36d7dcd7%40%3Ccommits.activemq.apache.org%3E
https://lists.apache.org/thread.html/rb2fd3bf2dce042e0ab3f3c94c4767c96bb2e7e6737624d63162df36d%40%3Ccommits.activemq.apache.org%3E
https://www.oracle.com//security-alerts/cpujul2021.htmlPatch, Third Party Advisory
https://www.oracle.com/security-alerts/cpuApr2021.htmlPatch, Third Party Advisory
https://www.oracle.com/security-alerts/cpujan2021.htmlThird Party Advisory
https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Third Party Advisory

Timeline

Published: Sep 10, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-11998?

How severe is CVE-2020-11998?

CVE-2020-11998 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 51.23% probability of exploitation in the next 30 days.

How do I fix CVE-2020-11998?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-11998?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST