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Vulnerability details: VCID-4thq-85c5-d7cs
Vulnerability ID VCID-4thq-85c5-d7cs
Aliases CVE-2017-20189
GHSA-jgxc-8mwq-9xqw
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 9.0
Risk 4.5
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-502 Deserialization of Untrusted Data
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.03376 https://api.first.org/data/v1/epss?cve=CVE-2017-20189
epss 0.03376 https://api.first.org/data/v1/epss?cve=CVE-2017-20189
epss 0.03376 https://api.first.org/data/v1/epss?cve=CVE-2017-20189
epss 0.03376 https://api.first.org/data/v1/epss?cve=CVE-2017-20189
cvssv3.1 9.8 https://clojure.atlassian.net/browse/CLJ-2204
generic_textual CRITICAL https://clojure.atlassian.net/browse/CLJ-2204
ssvc Track* https://clojure.atlassian.net/browse/CLJ-2204
cvssv3.1_qr CRITICAL https://github.com/advisories/GHSA-jgxc-8mwq-9xqw
cvssv3.1 9.8 https://github.com/clojure/clojure
generic_textual CRITICAL https://github.com/clojure/clojure
cvssv3.1 9.8 https://github.com/clojure/clojure/commit/271674c9b484d798484d134a5ac40a6df15d3ac3
generic_textual CRITICAL https://github.com/clojure/clojure/commit/271674c9b484d798484d134a5ac40a6df15d3ac3
ssvc Track* https://github.com/clojure/clojure/commit/271674c9b484d798484d134a5ac40a6df15d3ac3
cvssv3.1 9.8 https://github.com/frohoff/ysoserial/pull/68/files
generic_textual CRITICAL https://github.com/frohoff/ysoserial/pull/68/files
ssvc Track* https://github.com/frohoff/ysoserial/pull/68/files
cvssv3.1 9.8 https://groups.google.com/d/msg/clojure/WaL3hHzsevI/7zHU-L7LBQAJ
generic_textual CRITICAL https://groups.google.com/d/msg/clojure/WaL3hHzsevI/7zHU-L7LBQAJ
cvssv3.1 9.8 https://hackmd.io/%40fe1w0/HyefvRQKp
generic_textual CRITICAL https://hackmd.io/%40fe1w0/HyefvRQKp
ssvc Track* https://hackmd.io/%40fe1w0/HyefvRQKp
cvssv3.1 9.8 https://nvd.nist.gov/vuln/detail/CVE-2017-20189
generic_textual CRITICAL https://nvd.nist.gov/vuln/detail/CVE-2017-20189
cvssv3.1 9.8 https://security.netapp.com/advisory/ntap-20241108-0002
generic_textual CRITICAL https://security.netapp.com/advisory/ntap-20241108-0002
cvssv3.1 9.8 https://security.snyk.io/vuln/SNYK-JAVA-ORGCLOJURE-5740378
generic_textual CRITICAL https://security.snyk.io/vuln/SNYK-JAVA-ORGCLOJURE-5740378
ssvc Track* https://security.snyk.io/vuln/SNYK-JAVA-ORGCLOJURE-5740378
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2017-20189
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-20189
https://github.com/clojure/clojure
https://groups.google.com/d/msg/clojure/WaL3hHzsevI/7zHU-L7LBQAJ
https://security.netapp.com/advisory/ntap-20241108-0002
271674c9b484d798484d134a5ac40a6df15d3ac3 https://github.com/clojure/clojure/commit/271674c9b484d798484d134a5ac40a6df15d3ac3
CLJ-2204 https://clojure.atlassian.net/browse/CLJ-2204
CVE-2017-20189 https://nvd.nist.gov/vuln/detail/CVE-2017-20189
files https://github.com/frohoff/ysoserial/pull/68/files
GHSA-jgxc-8mwq-9xqw https://github.com/advisories/GHSA-jgxc-8mwq-9xqw
HyefvRQKp https://hackmd.io/%40fe1w0/HyefvRQKp
SNYK-JAVA-ORGCLOJURE-5740378 https://security.snyk.io/vuln/SNYK-JAVA-ORGCLOJURE-5740378
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://clojure.atlassian.net/browse/CLJ-2204
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:Y/T:T/P:M/B:A/M:M/D:R/2025-05-08T15:59:16Z/ Found at https://clojure.atlassian.net/browse/CLJ-2204
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://github.com/clojure/clojure
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://github.com/clojure/clojure/commit/271674c9b484d798484d134a5ac40a6df15d3ac3
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:Y/T:T/P:M/B:A/M:M/D:R/2025-05-08T15:59:16Z/ Found at https://github.com/clojure/clojure/commit/271674c9b484d798484d134a5ac40a6df15d3ac3
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://github.com/frohoff/ysoserial/pull/68/files
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:Y/T:T/P:M/B:A/M:M/D:R/2025-05-08T15:59:16Z/ Found at https://github.com/frohoff/ysoserial/pull/68/files
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://groups.google.com/d/msg/clojure/WaL3hHzsevI/7zHU-L7LBQAJ
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://hackmd.io/%40fe1w0/HyefvRQKp
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:Y/T:T/P:M/B:A/M:M/D:R/2025-05-08T15:59:16Z/ Found at https://hackmd.io/%40fe1w0/HyefvRQKp
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2017-20189
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://security.netapp.com/advisory/ntap-20241108-0002
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://security.snyk.io/vuln/SNYK-JAVA-ORGCLOJURE-5740378
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:Y/T:T/P:M/B:A/M:M/D:R/2025-05-08T15:59:16Z/ Found at https://security.snyk.io/vuln/SNYK-JAVA-ORGCLOJURE-5740378
Exploit Prediction Scoring System (EPSS)
Percentile 0.87647
EPSS Score 0.03376
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-11T16:55:16.824148+00:00 Vulnrichment Import https://github.com/cisagov/vulnrichment/blob/develop/2017/20xxx/CVE-2017-20189.json 38.6.0