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Nuclei Templates

X-Forwarded-For 403-forbidden bypass

ID: xff-403-bypass

Severity: info

Author: vavkamil

Tags: fuzzing,xff-403-bypass

Description

Section titled “Description”

Template to detect 403 forbidden endpoint bypass behind Nginx/Apache proxy & load balancers, based on X-Forwarded-For header.

YAML Source

Section titled “YAML Source”
id: xff-403-bypass


info:
  name: X-Forwarded-For 403-forbidden bypass
  author: vavkamil
  severity: info
  description: Template to detect 403 forbidden endpoint bypass behind Nginx/Apache proxy & load balancers, based on X-Forwarded-For header.
  metadata:
    max-request: 3
  tags: fuzzing,xff-403-bypass


http:
  - raw:
      - |
        GET / HTTP/1.1
        Host: {{Hostname}}
        Accept: */*


      - |
        GET / HTTP/1.1
        Host: {{Hostname}}
        Accept: */*
        X-Forwarded-For: 127.0.0.1, 0.0.0.0, 192.168.0.1, 10.0.0.1, 172.16.0.1


    matchers:
      - type: dsl
        dsl:
          - "status_code_1 == 403 && status_code_2 != 403"
# digest: 4a0a00473045022100e2dcf717113015be1556a9a8451a7c81c863b7df616bccfc4e1e6badbe86726d02202a9b0193ed24cc5b73f3726af7f04a64263175c29de4dc97da15b197d484fed4:922c64590222798bb761d5b6d8e72950

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/fuzzing/xff-403-bypass.yaml"

View on Github