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Nuclei Templates

postMessage - Cross-Site Scripting

ID: wildcard-postmessage

Severity: unknown

Author: pdteam

Tags: xss,postmessage,misconfig

Description

Section titled “Description”

postMessage contains a cross-site scripting vulnerability. An attacker can execute arbitrary script and therefore steal cookie-based authentication credentials and launch other attacks.

YAML Source

Section titled “YAML Source”
id: wildcard-postmessage


info:
  name: postMessage - Cross-Site Scripting
  author: pdteam
  severity: unknown
  description: postMessage contains a cross-site scripting vulnerability. An attacker can execute arbitrary script and therefore steal cookie-based authentication credentials and launch other attacks.
  reference:
    - https://jlajara.gitlab.io/web/2020/06/12/Dom_XSS_PostMessage.html
    - https://payatu.com/blog/anubhav.singh/postmessage-vulnerabilities
    - https://developer.mozilla.org/en-US/docs/Web/API/Window/postMessage
  classification:
    cvss-metrics: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
    cvss-score: 7.2
    cwe-id: CWE-79
  metadata:
    max-request: 1
  tags: xss,postmessage,misconfig


http:
  - method: GET
    path:
      - '{{BaseURL}}'


    matchers:
      - type: regex
        regex:
          - postMessage\([a-zA-Z]+,["']\*["']\)
# digest: 490a00463044022065024d42ebeac4d77f3bde96575fe28fe9aab8e72ea151640629c712ceed77a8022053e7c00510ebaa1909113c59bf0669984376de169eeeabad2b2bcf970d49ae67:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

Section titled “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.

Terminal window
$ nuclei -u "URL" -t "http/misconfiguration/wildcard-postmessage.yaml"

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