Remote code execution in Apache Tomcat

Published: 2020-05-21
Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-9484
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
Apache Tomcat
Server applications / Web servers

Vendor Apache Foundation

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Deserialization of Untrusted Data

EUVDB-ID: #VU28158

Risk: High


CVE-ID: CVE-2020-9484

CWE-ID: CWE-502 - Deserialization of Untrusted Data

Exploit availability: Yes


The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to insecure input validation when processing serialized data in uploaded files names. A remote attacker can pass specially crafted file name to the application and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system but requires that the server is configured to use PersistenceManager with a FileStore and the attacker knows relative file path from storage location.


Install updates from vendor's website.

Vulnerable software versions

Apache Tomcat: 10.0.0-M1 -, 9.0.0 - 9.0.34, 8.5.0 - 8.5.54, 8.0.0 - 8.0.53, 7.0.0 - 7.0.103

CPE2.3 External links

Q & A

Can this vulnerability be exploited remotely?

How the attacker can exploit this vulnerability?

Is there known malware, which exploits this vulnerability?