Authentication bypass in Apache ActiveMQ

Published: 2020-09-14
Risk High
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2020-11998
Exploitation vector Network
Public exploit N/A
Vulnerable software
Server applications / Mail servers

Vendor Apache Foundation

Security Advisory

This security advisory describes one high risk vulnerability.

1) Improper Authentication

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2020-11998

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No


The vulnerability allows a remote client to bypass authentication process.

The vulnerability exists due to an error in authentication process, caused by incorrect implementation of protection measures against JMX re-bind attack. A remote attacker can bypass authentication process by passing an empty environment map to RMIConnectorServer, instead of the map that contains the authentication credentials.As a result, a remote client can create MBean and use it to create new MBeans from arbitrary URLs.

Successful exploitation of the vulnerability may allow an attacker to execute arbitrary code on the target system.


Install updates from vendor's website.

Vulnerable software versions

ActiveMQ: 5.15.12

CPE External links

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.