Vulnerabilities in pkg:maven/org.keycloak/keycloak-core

PACKAGE
Advisory Identifier: GHSA-rpj2-w6fr-79hc
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Advisory Summary

CVE-2020-35509 is a MODERATE (CVSS 5.4) improper certificate validation vulnerability (CWE-295: Improper Certificate Validation) affecting Keycloak core libraries in the Maven ecosystem. The issue involves keycloak vulnerable to improper certificate validation. Remediation is available by upgrading affected packages to version 14.0.0.

58 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:maven/org.keycloak/keycloak-core

58 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:maven/org.keycloak/keycloak-core. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-rpj2-w6fr-79hc CVE-2020-35509 MODERATE Keycloak vulnerable to Improper Certificate Validation
GHSA-q4xq-445g-g6ch CVE-2024-4028 LOW Keycloak allows cross-site scripting (XSS)
GHSA-93ww-43rr-79v3 CVE-2024-10039 HIGH Keycloak mTLS Authentication Bypass via Reverse Proxy TLS Termination
GHSA-9vm7-v8wj-3fqw CVE-2023-6927 MODERATE keycloak-core: open redirect via "form_post.jwt" JARM response mode
GHSA-3hrr-xwvg-hxvr - LOW Duplicate Advisory: Keycloak DoS via account lockout
GHSA-xmmm-jw76-q7vg CVE-2024-7318 MODERATE Keycloaks's One Time Passcode (OTP) is valid longer than expiration timeSeverity
GHSA-57rh-gr4v-j5f6 - MODERATE Duplicate Advisory: Keycloak Uses a Key Past its Expiration Date
GHSA-j9xq-j329-2xvg - MODERATE Duplicate Advisory: Keycloak user may register themselves with same email ID of any existing user
GHSA-w97f-w3hq-36g2 CVE-2023-6841 HIGH Keycloak Denial of Service vulnerability
GHSA-g4gc-rh26-m3p5 CVE-2024-7260 MODERATE Keycloak Open Redirect vulnerability
GHSA-gmrm-8fx4-66x7 - LOW Duplicate Advisory: Keycloak: Leak of configured LDAP bind credentials
GHSA-9695-w6h2-jpv9 CVE-2020-10686 MODERATE Keycloak users may be able to remove MFA from other users' devices
GHSA-8xj2-47xw-q78c CVE-2020-1724 MODERATE Keycloak Insufficient Session Expiry
GHSA-pcv5-m2wh-66j3 CVE-2020-27838 MODERATE Keycloak discloses information without authentication
GHSA-qgmm-f2qw-r95f CVE-2020-1698 MODERATE Keycloak leaks sensitive information in logged exceptions
GHSA-cf8f-w2c5-p5jr CVE-2019-14837 CRITICAL keycloak vulnerable to unauthorized login via mail server setup
GHSA-m6mm-q862-j366 CVE-2020-1714 HIGH Improper Input Validation in Keycloak
GHSA-5q66-v53q-pm35 CVE-2023-4918 HIGH Keycloak vulnerable to Plaintext Storage of User Password
GHSA-c77r-6f64-478q CVE-2017-2582 MODERATE keycloak-core discloses system properties
GHSA-w6gv-3r3v-gwgj CVE-2017-2585 MODERATE keycloak-core vulnerable to timing attacks against JWS token verification
GHSA-xf46-8vvp-4hxx CVE-2021-20262 MODERATE Keycloak Missing authentication for critical function
GHSA-px42-mr8m-cpgh CVE-2014-3656 MODERATE JBoss KeyCloak Cross-site Scripting Vulnerability
GHSA-3qh2-mccc-q5m6 CVE-2018-14658 MODERATE Keycloak Open Redirect
GHSA-c7xw-p58w-h6fj CVE-2023-0105 MODERATE Keycloak: Impersonation and lockout possible through incorrect handling of email trust
GHSA-vhvq-jh34-3fc8 - MODERATE Duplicate Advisory: Keycloak allows impersonation and lockout due to email trust not being handled correctly
GHSA-5cc8-pgp5-7mpm CVE-2023-1664 MODERATE Keycloak Untrusted Certificate Validation vulnerability
GHSA-c892-cwq6-qrqf - MODERATE Duplicate Advisory: Keycloak vulnerable to untrusted certificate validation
GHSA-v436-q368-hvgg CVE-2023-0091 MODERATE Keycloak has lack of validation of access token on client registrations endpoint
GHSA-755v-r4x4-qf7m - MODERATE Stored Cross-Site Scripting (XSS) in Keycloak via groups dropdown
GHSA-qpq9-jpv4-6gwr CVE-2021-3632 HIGH Keycloak allows anyone to register new security device or key for any user by using WebAuthn password-less login flow
GHSA-jh7q-5mwf-qvhw CVE-2020-10770 MODERATE Keycloak vulnerable to Server-Side Request Forgery
GHSA-w8v7-c7pm-7wfr - MODERATE Duplicate Advisory: Keycloak vulnerable to Cross-Site Scripting (XSS)
GHSA-95m6-mjh3-58gm CVE-2016-8609 HIGH Improper Authentication in org.keycloak:keycloak-core
GHSA-gf2j-7qwg-4f5x CVE-2018-14637 HIGH Improper Authentication in Keycloak
GHSA-r32r-3977-cgc3 CVE-2014-3651 HIGH Keycloak vulnerable to uncontrolled resource consumption
GHSA-jc6q-27mw-p55w CVE-2017-2646 HIGH Keycloak vulnerable to infinite loop based Denial of Service
GHSA-3w4v-rvc4-2xpw CVE-2021-3856 MODERATE Keycloak has Files or Directories Accessible to External Parties
GHSA-fqc7-5xxc-ph7r CVE-2022-0225 MODERATE Keycloak XSS via use of malicious payload as group name when creating new group from admin console
GHSA-q6w2-89hq-hq27 CVE-2021-20195 CRITICAL keycloak Self Stored Cross-site Scripting vulnerability
GHSA-f32v-vf79-p29q CVE-2022-1466 MODERATE Improper authorization in Keycloak
GHSA-xpgc-j48j-jwv9 CVE-2021-20323 MODERATE Cross-site Scripting in Keycloak
GHSA-m9cj-v55f-8x26 CVE-2020-27826 HIGH Authentication Bypass in keycloak
GHSA-6xp6-fmc8-pmmr CVE-2021-20202 HIGH Temporary Directory Hijacking Vulnerability in Keycloak
GHSA-c9x9-xv66-xp3v CVE-2020-14389 HIGH Improper privilege management in Keycloak
GHSA-xfqh-7356-vqjj CVE-2019-14820 MODERATE Exposure of Sensitive Information to an Unauthorized Actor in Keycloak
GHSA-p5xp-6vpf-jwvh CVE-2019-10199 HIGH Improper Input Validation and Cross-Site Request Forgery in Keycloak
GHSA-7m27-3587-83xf CVE-2019-10170 HIGH Privilege Defined With Unsafe Actions in Keycloak
GHSA-4gf2-xv97-63m2 CVE-2020-1744 MODERATE Exposure of Sensitive Information in keycloak
GHSA-h7j7-pw3v-3v3x CVE-2018-10912 MODERATE Moderate severity vulnerability that affects org.keycloak:keycloak-core
GHSA-6pmv-7pr9-cgrj CVE-2020-1731 CRITICAL Predictable password in Keycloak
GHSA-8vf3-4w62-m3pq CVE-2020-1697 MODERATE XSS in Keycloak
GHSA-38cg-gg9j-q9j9 CVE-2019-3875 MODERATE Improper Certificate Validation and Insufficient Verification of Data Authenticity in Keycloak
GHSA-gc52-xj6p-9pxp CVE-2019-3868 MODERATE Exposure of Sensitive Information to an Unauthorized Actor in Keycloak
GHSA-4fgq-gq9g-3rw7 CVE-2019-10201 MODERATE Improper Verification of Cryptographic Signature in keycloak
GHSA-qgm9-232x-hwpx CVE-2017-1000500 MODERATE Moderate severity vulnerability that affects org.keycloak:keycloak-core
GHSA-959q-32g8-vvp7 CVE-2017-12161 MODERATE Moderate severity vulnerability that affects org.keycloak:keycloak-core
GHSA-778x-2mqv-w6xw CVE-2016-8629 MODERATE Moderate severity vulnerability that affects org.keycloak:keycloak-core
GHSA-3gg7-9q2x-79fc CVE-2020-1728 MODERATE Improper Restriction of Rendered UI Layers or Frames in Keycloak

CVE-2020-35509 at a Glance

CVE Identifier CVE-2020-35509
GHSA Identifier GHSA-rpj2-w6fr-79hc
Severity MODERATE
CVSS v3.1 Base Score 5.4
CWE Classification CWE-295: Improper Certificate Validation
Affected Product Keycloak core
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 5.4

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2020-35509

To remediate this vulnerability, upgrade all affected Keycloak core dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

org.keycloak:keycloak-core fixed: 14.0.0 
<dependency>
    <groupId>org.keycloak</groupId>
    <artifactId>keycloak-core</artifactId>
    <version>14.0.0</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree -Dincludes=org.keycloak

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2020-35509, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.keycloak

Analyze the terminal output to locate any version of Keycloak core in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 14.0.0), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.keycloak command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-295: Improper Certificate Validation, where the product does not validate, or incorrectly validates, a certificate. In Keycloak core, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

keycloak accepts an expired certificate by the direct-grant authenticator because of missing time stamp validations. The highest threat from this vulnerability is to data confidentiality and integrity. This issue was partially fixed in version [13.0.1](https://github.com/keycloak/keycloak/pull/6330) and more completely fixed in version [14.0.0](https://github.com/keycloak/keycloak/pull/8067).

CVE-2020-35509 Affected Keycloak core Versions

1 component(s)
Fixed Versions:
14.0.0
Product / Package Ecosystem Affected Versions Fixed Version
org.keycloak:keycloak-core
maven/org.keycloak/keycloak-core
Maven
< 14.0.0
14.0.0

References

NVD — CVE-2020-35509 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-35509
Keycloak core Source Repository REPOSITORY
https://github.com/keycloak/keycloak/pull/6330
Keycloak core Source Repository REPOSITORY
https://github.com/keycloak/keycloak/pull/8067
Security Fix Commit FIX COMMIT
https://github.com/keycloak/keycloak/commit/478319348bdfdb9b6d39122f41edf2af79f679bb
Keycloak core Security Information SECURITY
https://access.redhat.com/security/cve/cve-2020-35509
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=1912427
Keycloak core Source Repository REPOSITORY
https://github.com/keycloak/keycloak
Keycloak core Source Repository REPOSITORY
https://github.com/keycloak/keycloak/blob/4f330f4a57cbfcf6202b60546518261c66e59a35/services/src/main/java/org/keycloak/authentication/authenticators/x509/ValidateX509CertificateUsername.java#L74-L76

Frequently Asked Questions

What is CVE-2020-35509?
CVE-2020-35509 is a security vulnerability in Keycloak core involving Keycloak vulnerable to Improper Certificate Validation under CWE-295: Improper Certificate Validation.
Which Keycloak core versions are affected?
Affected versions include releases prior to 14.0.0 across affected packages: org.keycloak:keycloak-core.
What version fixes CVE-2020-35509?
Upgrading to 14.0.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is keycloak-core affected?
Yes, org.keycloak:keycloak-core is affected in releases prior to 14.0.0. Upgrade your dependency to 14.0.0 or later.
What is the CVSS score of CVE-2020-35509?
CVE-2020-35509 has a CVSS v3.1 base score of 5.4 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.
What CWE is associated with CVE-2020-35509?
CVE-2020-35509 is classified under CWE-295: Improper Certificate Validation (The product does not validate, or incorrectly validates, a certificate.).
How can I check Maven dependencies for CVE-2020-35509?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.keycloak'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-rpj2-w6fr-79hc",
  "modified" : "2025-06-30T21:46:07Z",
  "published" : "2022-08-24T00:00:29Z",
  "aliases" : [ "CVE-2020-35509" ],
  "summary" : "Keycloak vulnerable to Improper Certificate Validation",
  "details" : "keycloak accepts an expired certificate by the direct-grant authenticator because of missing time stamp validations. The highest threat from this vulnerability is to data confidentiality and integrity.\n\nThis issue was partially fixed in version [13.0.1](https://github.com/keycloak/keycloak/pull/6330) and more completely fixed in version [14.0.0](https://github.com/keycloak/keycloak/pull/8067).",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.keycloak:keycloak-core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "14.0.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-35509"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/keycloak/keycloak/pull/6330"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/keycloak/keycloak/pull/8067"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/keycloak/keycloak/commit/478319348bdfdb9b6d39122f41edf2af79f679bb"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/security/cve/cve-2020-35509"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=1912427"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/keycloak/keycloak"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/keycloak/keycloak/blob/4f330f4a57cbfcf6202b60546518261c66e59a35/services/src/main/java/org/keycloak/authentication/authenticators/x509/ValidateX509CertificateUsername.java#L74-L76"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-20", "CWE-295" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-12-05T23:03:56Z",
    "nvd_published_at" : "2022-08-23T16:15:00Z"
  }
}