nuclei-templates/misconfiguration/xss-deprecated-header.yaml

id: xss-deprecated-header-detect

info:
  name: Detect Deprecated XSS Protection Header
  author: joshlarsen
  severity: info
  description: Setting the XSS-Protection header is deprecated by most browsers. Setting the header to anything other than `0` can actually introduce an XSS vulnerability.
  reference:
    - https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-XSS-Protection
    - https://owasp.org/www-project-secure-headers/#x-xss-protection
  tags: xss,misconfig,generic

requests:
  - method: GET
    path:
      - "{{BaseURL}}"

    matchers-condition: and
    matchers:

      - type: regex
        part: header
        regex:
          - "(?i)x-xss-protection: 0"
        negative: true

      - type: regex
        part: header
        regex:
          - "(?i)x-xss-protection: 1+"

    extractors:
      - type: kval
        part: header
        kval:
          - x_xss_protection