CVE-2017-20189

In Clojure before 1.9.0, classes can be used to construct a serialized object that executes arbitrary code upon deserialization. This is relevant if a server deserializes untrusted objects.

Published: Jan 22, 2024
Updated: May 4, 2025
CVE: CVE-2017-20189
GHSA: GHSA-jgxc-8mwq-9xqw
Severity: Critical
Exploit:

CVSS v3:

Severity: Critical
Score: 9.8
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWEs:

CWE-502

OWASP TOP 10:

A8 - Insecure Deserialization

Affected Software
References

Software	From	Fixed in
org.clojure / clojure	-	1.9.0
clojure / clojure	-	1.9.0

https://clojure.atlassian.net/browse/CLJ-2204
https://github.com/clojure/clojure/commit/271674c9b484d798484d134a5ac40a6df15d3ac3
https://github.com/frohoff/ysoserial/pull/68/files
https://groups.google.com/d/msg/clojure/WaL3hHzsevI/7zHU-L7LBQAJ
https://hackmd.io/%40fe1w0/HyefvRQKp
https://security.snyk.io/vuln/SNYK-JAVA-ORGCLOJURE-5740378

Vulnerability Database

CVE-2017-20189