CVE-2020-1714Network attack vector

Authenticated code execution via unchecked Java deserialization

Published May 13, 2020 · Updated Aug 4, 2024

Unsafe deserialization in Red Hat build of Keycloak before 11.0.0 allows remote authenticated users to execute code via crafted Java objects. OIDC session, principal, security-context, and Kerberos deserialization paths read serialized classes without ObjectInputFilter allowlists. Valid access to an affected serialized-data path is required, and successful exploitation runs code in the privileged application context.

CVSS severity7.5
High
EPSS probability2.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unsafe deserialization in Red Hat build of Keycloak before 11.0.0 allows remote authenticated users to execute code via crafted Java objects. OIDC session, principal, security-context, and Kerberos deserialization paths read serialized classes without ObjectInputFilter allowlists. Valid access to an affected serialized-data path is required, and successful exploitation runs code in the privileged application context.

The record

CVE
CVE-2020-1714
Published
May 13, 2020
Updated
Aug 4, 2024
Vendor
Red Hat
Product
Red Hat build of Keycloak
Classifications
CWE-20, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 13, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=before 11.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Red Hat · Red Hat build of Keycloakversion=before 11.0.0

Published CVSS scores

6.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/A:P
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.5Red Hat, Inc.CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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