CVE-2020-11998

What it is

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

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of data exposure, data tampering, service disruption.

Exploit odds

48.9% chance of exploitation in the next 30 days (EPSS). Higher than most.

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2020-04-21 00:00 UTC ReservedThe CVE id was reserved by its CNA
2. 2020-09-10 19:15 UTC PublishedDisclosed publicly on CVE.org and NVD
3. 2026-06-17 02:51 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 48.9% in the next 30 days (EPSS).
• Severity: 9.8 CRITICAL (CVSS).
• Fix: a patch or advisory is linked.
• It meets the bar for Drop everything: critical, and exploited or very likely to be.

Details

Published

2020-09-10 19:15 UTC

Last modified

2026-06-17 02:51 UTC

Exploit probability

48.9% · EPSS, next 30 days

Record status

Modified

Affected

• Apache Activemq 5.15.12
• Oracle Communications Diameter Signaling Router ≤ 8.5.0
• Oracle Communications Element Manager ≤ 8.2.4.0
• Oracle Communications Session Report Manager ≤ 8.2.2
• Oracle Communications Session Route Manager ≤ 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

Attack profile CVSS 3.1 · 9.8

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2020-11998.md and follow it. Check whether this project is affected by CVE-2020-11998. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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