redirectfinder - A fast and efficient Open Redirect vulnerability s

项目说明

RedirectFinder

A fast and efficient Open Redirect scanner written in Go. This tool automates the process of testing URLs for open redirect by replacing parameter with redirect payloads and checking HTTP responses.

Features

Installation

Prerequisites

Installation

Install via Go

Download Prebuilt Binaries

Or download the latest release for your platform.

Compile from Source

Usage

Basic Usage

Command-Line Flags

| Flag | Short | Description | Default |
|------|------|-------------|---------|
| --payload | -p | Payload(s) to use: single ("), comma-separated (" //bing.com"), or file path (payloads.txt) | ~/.config/redirectfinder/payloads.txt |
| --redirect | | Domain to check for in Location header | bing.com |
| --timeout | | HTTP request timeout in seconds | 30 |
| --concurrent | | Number of concurrent URL scans | 50 |
| --vuln | | Show only URLs | false |
| --silent | | Silent mode (suppress banner) | false |
| -- | | Print and exit | false |
| --nc | | Disable colored output | false |
| -- | | Show output (download messages, etc.) | false |
| --domain | | Extract unique domains and append payloads to the end of the domain | false |
| --only-domain | | Extract unique domains and append payloads to the end of the domain (domain mode only) | false |
| --no-resume | | Disable resume; start scanning fresh and ignore any existing resume.cfg | false |

Examples

#### Test with default settings

#### Test with custom timeout and concurrency

#### Start fresh without resuming

#### Show only URLs

#### Silent mode with no colors

#### Custom single payload

#### Multiple comma-separated payloads

#### Custom payloads file

#### mode (shows download messages)

#### Domain payload mode (unique domains)

#### Domain-only payload mode

#### Custom redirect domain

How It Works

1. URL Input: Reads URLs from stdin (supports both echo and cat)

2. URL Filtering: Automatically filters URLs using:

- Deduplicates URLs
- Filters URLs containing = or %3D (URL-encoded equals)
- Excludes URLs with static file extensions

3. Payload Testing: For each URL:
- Replaces all parameter with each redirect payload
- Handles both = and %3D separators
- Makes HTTP GET requests with modified URLs (without following redirects)
- Checks HTTP response for redirect status code (3xx) and Location header

4. Detection: The tool detects open redirect by checking:
- HTTP Status Code is 3xx (any redirect: 300, 301, 302, 303, 304, 307, 308)
- Location header contains the specified domain (default: bing.com, customizable with --redirect flag, case-insensitive)
- Both conditions must be true for detection

5. Output: Displays results:
- : Red colored output when open redirect is detected
- NOT : Green colored output when no is found

Default Payloads

On first run, if no -p flag is provided, the tool automatically:

You can o the default payloads using the --payload flag with:

Use -- flag to see download messages.

Output Format

Colored Output (Default)

No Color Output (--nc flag)

URL Parameter Handling

The tool supports both standard and URL-encoded parameter separators:

Both formats are automatically detected and tested.

Domain Payload Mode

There are two domain payload modes:

Domain payload scanning works as follows:

1. Domain Extraction: Reads URLs from stdin, extracts only http/https domains, and deduplicates them using:

2. Payload Testing: For each unique domain, appends each payload directly to the end of the domain and sends the request.
3. Detection: Uses the same redirect rules and --redirect domain matching as the parameter mode.

Detection

The tool detects open redirect by checking HTTP responses for:
1. Status Code: Must be 3xx (300-399) - any redirect status code
2. Location Header: Must contain the specified domain (default: bing.com, customizable with --redirect flag, case-insensitive)

Both conditions must be true to confirm an open redirect . The HTTP client is configured to not follow redirects automatically, allowing the tool to inspect the redirect response directly.

You can specify a custom domain to check for using the --redirect flag:

Performance

Resume Functionality

When scanning from a list (stdin), resume is enabled by default. Progress is sa each host to a resume.cfg file in the current directory in statistics format:

If a scan is interrupted (e.g., CTRL+C, terminal closed, system restart), re-run the same command in the same directory to automatically resume. The scanner skips the first scanned items from the post-filtered input stream and continues.

The resume counter is defined over the post-filtered stream (after urldedupe/grep/sort), so resuming requires running the same command again to reproduce the same filtered order.

Interrupt Handling

The scanner responds immediately to the first CTRL+C:

To resume an interrupted scan, simply run the same command again in the same directory. The scanner will continue from where it left off. The resume file is automatically deleted after successful completion.

项目信息

开发语言：Go

Star 数：9

技术要点

该项目属于安全软件方向的开源资源，代码结构清晰，适合安全研究人员学习参考。项目围绕A fast and efficient Open Redirect vulnerability scanner written in Go. This tool automates the process of testing URLs for open redirect vulnerabilities by replacing parameter values with redirect payloads and checking HTTP responses.展开，提供了可运行的实现，对理解相关安全机制、工具原理与攻防技术具有较高的研究价值。

从技术实现角度看，此类项目的核心在于对底层原理的深入理解与工程化落地。开发者在研究过程中可以结合官方文档与社区讨论，梳理项目的初始化流程、核心模块职责与数据流转，逐步掌握其中的技术细节与设计思路。

使用与学习建议

1. 下载源码压缩包，解压到本地环境。

2. 根据项目类型准备对应的运行环境与依赖。

3. 按照 README 中的步骤完成配置与部署。

4. 在隔离的测试环境中运行验证，避免影响生产系统。

免责声明

本资源来源于开源社区，仅供安全研究、技术学习与合法授权范围内的攻防演练使用，请勿用于任何非法或侵害他人权益的用途。使用本项目产生的一切后果由使用者自行承担。