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Vulnerability details: VCID-ffj8-xhcs-7kfx
Vulnerability ID VCID-ffj8-xhcs-7kfx
Aliases CVE-2018-14655
GHSA-458h-wv48-fq75
Summary Keycloak vulnerable to cross-site scripting via the state parameter A flaw was found in Keycloak 3.4.3.Final, 4.0.0.Beta2, 4.3.0.Final. When using `response_mode=form_post` it is possible to inject arbitrary Javascript-Code via the 'state'-parameter in the authentication URL. This allows an XSS-Attack upon succesfully login.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv3.1 5.4 https://access.redhat.com/errata/RHSA-2018:3592
generic_textual MODERATE https://access.redhat.com/errata/RHSA-2018:3592
cvssv3.1 5.4 https://access.redhat.com/errata/RHSA-2018:3593
generic_textual MODERATE https://access.redhat.com/errata/RHSA-2018:3593
cvssv3.1 5.4 https://access.redhat.com/errata/RHSA-2018:3595
generic_textual MODERATE https://access.redhat.com/errata/RHSA-2018:3595
cvssv3 4.6 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-14655.json
epss 0.00234 https://api.first.org/data/v1/epss?cve=CVE-2018-14655
epss 0.00234 https://api.first.org/data/v1/epss?cve=CVE-2018-14655
epss 0.00234 https://api.first.org/data/v1/epss?cve=CVE-2018-14655
epss 0.00234 https://api.first.org/data/v1/epss?cve=CVE-2018-14655
epss 0.00234 https://api.first.org/data/v1/epss?cve=CVE-2018-14655
epss 0.00234 https://api.first.org/data/v1/epss?cve=CVE-2018-14655
epss 0.00234 https://api.first.org/data/v1/epss?cve=CVE-2018-14655
epss 0.00234 https://api.first.org/data/v1/epss?cve=CVE-2018-14655
epss 0.00234 https://api.first.org/data/v1/epss?cve=CVE-2018-14655
epss 0.00234 https://api.first.org/data/v1/epss?cve=CVE-2018-14655
epss 0.00234 https://api.first.org/data/v1/epss?cve=CVE-2018-14655
epss 0.00234 https://api.first.org/data/v1/epss?cve=CVE-2018-14655
epss 0.00234 https://api.first.org/data/v1/epss?cve=CVE-2018-14655
epss 0.00234 https://api.first.org/data/v1/epss?cve=CVE-2018-14655
epss 0.00234 https://api.first.org/data/v1/epss?cve=CVE-2018-14655
epss 0.00324 https://api.first.org/data/v1/epss?cve=CVE-2018-14655
epss 0.00324 https://api.first.org/data/v1/epss?cve=CVE-2018-14655
epss 0.00324 https://api.first.org/data/v1/epss?cve=CVE-2018-14655
cvssv3.1 5.4 https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14655
generic_textual MODERATE https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14655
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-458h-wv48-fq75
cvssv3.1 5.4 https://github.com/keycloak/keycloak
generic_textual MODERATE https://github.com/keycloak/keycloak
cvssv2 3.5 https://nvd.nist.gov/vuln/detail/CVE-2018-14655
cvssv3 5.4 https://nvd.nist.gov/vuln/detail/CVE-2018-14655
cvssv3.1 5.4 https://nvd.nist.gov/vuln/detail/CVE-2018-14655
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2018-14655
Reference id Reference type URL
https://access.redhat.com/errata/RHSA-2018:3592
https://access.redhat.com/errata/RHSA-2018:3593
https://access.redhat.com/errata/RHSA-2018:3595
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-14655.json
https://api.first.org/data/v1/epss?cve=CVE-2018-14655
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14655
https://github.com/keycloak/keycloak
https://nvd.nist.gov/vuln/detail/CVE-2018-14655
1625396 https://bugzilla.redhat.com/show_bug.cgi?id=1625396
cpe:2.3:a:redhat:keycloak:3.4.3:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:redhat:keycloak:3.4.3:*:*:*:*:*:*:*
cpe:2.3:a:redhat:keycloak:4.0.0:beta2:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:redhat:keycloak:4.0.0:beta2:*:*:*:*:*:*
cpe:2.3:a:redhat:keycloak:4.3.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:redhat:keycloak:4.3.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:single_sign-on:-:*:*:*:text-only:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:redhat:single_sign-on:-:*:*:*:text-only:*:*:*
GHSA-458h-wv48-fq75 https://github.com/advisories/GHSA-458h-wv48-fq75
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Found at https://access.redhat.com/errata/RHSA-2018:3592
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:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Found at https://access.redhat.com/errata/RHSA-2018:3593
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:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Found at https://access.redhat.com/errata/RHSA-2018:3595
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:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-14655.json
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:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Found at https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14655
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:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Found at https://github.com/keycloak/keycloak
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: AV:N/AC:M/Au:S/C:N/I:P/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2018-14655
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2018-14655
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:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2018-14655
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
Exploit Prediction Scoring System (EPSS)
Percentile 0.46193
EPSS Score 0.00234
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T09:05:52.399984+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/05/GHSA-458h-wv48-fq75/GHSA-458h-wv48-fq75.json 37.0.0