Php File Audit

Q: What does the Php File Audit AI skill do?

PHP 源码文件操作类漏洞审计。当在 PHP 白盒审计中需要检测文件相关漏洞时触发。 覆盖 5 类文件风险: 任意文件上传(类型绕过/路径穿越/二次渲染)、任意文件读取(include/fread/路径穿越)、 任意文件写入(日志注入/配置覆盖)、文件系统竞争(TOCTOU/符号链接)、归档提取漏洞(Zip Slip)。 需要 php-audit-pipeline 提供的数据流证据。

Q: Why use Php File Audit on TypingMind?

Because you install it once and use it with any model. Php File Audit is plain Markdown rather than provider-specific code, so the same skill runs on GPT-5, Claude, Gemini, Grok, or a local model — and you can switch model mid-chat without it breaking. TypingMind runs on your own API keys, so you pay providers directly instead of a per-seat subscription, and your skills and chats stay in your own storage.

Q: How do I install Php File Audit in TypingMind?

Open Plugins → Skills → Install from GitHub in TypingMind and paste https://github.com/wgpsec/AboutSecurity/tree/master/skills/code-audit/php/php-file-audit. TypingMind reads its SKILL.md and bundles its files and installs it as a skill you can enable per chat.

Q: Which AI models can use Php File Audit?

Any model you connect in TypingMind. AI skills are plain Markdown instructions rather than provider-specific code, so GPT, Claude, Gemini, Grok, and local models can all load this skill when a request matches it.

Q: How many AI models can I use with Php File Audit?

As many as you like. As long as a model supports skills, you can use Php File Audit with it — GPT, Claude, Gemini, Grok, DeepSeek, Mistral, Llama and more — all on TypingMind with your own API keys.

Q: Is the Php File Audit AI skill free?

It is published on GitHub by wgpsec. Check the repository for licensing terms. You only pay your own AI provider for the tokens you use.

Q: What are AI skills?

An AI skill is a reusable instruction bundle that teaches an AI model how to do one specific task. It follows the open Agent Skills format: a SKILL.md file with a name and description, plus any scripts, templates or reference files the model may need. The model reads the instructions only when your request matches the skill, so an installed skill costs nothing until it is used.

Q: How are AI skills different from plugins or MCP servers?

A plugin or MCP server gives a model new tools to call — code that runs somewhere and returns a result. An AI skill gives the model knowledge and process instead: how to approach a task, which steps to follow, what good output looks like. Skills are plain Markdown, so they need no server, no API key and no runtime, and they work with any model.

OrganizationPopular

wgpsec

php-file-audit

PHP 源码文件操作类漏洞审计。当在 PHP 白盒审计中需要检测文件相关漏洞时触发。覆盖 5 类文件风险: 任意文件上传(类型绕过/路径穿越/二次渲染)、任意文件读取(include/fread/路径穿越)、任意文件写入(日志注入/配置覆盖)、文件系统竞争(TOCTOU/符号链接)、归档提取漏洞(Zip Slip)。需要 php-audit-pipeline 提供的数据流证据。

Overview

Publisher	wgpsec
Repository	`AboutSecurity`
Skill name	`php-file-audit`
Stars	1.7K
Forks	242
Bundled files	1
Links	Skill source Repository

Markdown instructions
A SKILL.md file the model loads on demand, so it only costs tokens when a request actually matches.
Works with any LLM
AI skills are plain Markdown, not provider-specific code, so this works with GPT, Claude, Gemini, Grok, or a local model.
1 bundled files
Scripts, templates, and references the model can read while it works. Files are read-only and never executed.
Open source
Published by wgpsec on GitHub. Read the source before you install it.

Installation

Install the Php File Audit AI skill in TypingMind to use it with any LLM, or drop it into another agent that reads SKILL.md.

Install in TypingMind

TypingMind installs a skill straight from its GitHub folder — it reads SKILL.md, bundles the resource files, and stores the result locally.

Open the app and go to Plugins → Skills.
Choose "Install from GitHub".
Paste the skill folder URL below and confirm.
Enable the skill in any chat where you want it available.

Store

Installed

Skills

Add skills

Import one or more skills from a public GitHub folder or a local .skill or .zip archive, or SKILL.md file.

From GitHub URLFrom .skill, .zip, or SKILL.md

GitHub repo or folder

https://github.com/wgpsec/AboutSecurity/tree/master/skills/code-audit/php/php-file-audit

Points to a single skill folder, or any folder that contains multiple skills. Public repos only.

CancelContinue

Plugins → Skills → Add skill → From GitHub URL, then paste the folder URL and press Continue.

Install in another agent

Any agent that reads the Agent Skills format can use this skill — copy the folder into that agent's skills directory.

Claude Code — .claude/skills

git clone --depth 1 https://github.com/wgpsec/AboutSecurity.git /tmp/AboutSecurity
mkdir -p .claude/skills
cp -r /tmp/AboutSecurity/skills/code-audit/php/php-file-audit .claude/skills/php-file-audit

Restart Claude Code after copying so it picks up the new skill.

Use it in TypingMind

Enable Php File Audit in any TypingMind chat and the model takes it from there. Its name and description sit in the system prompt, and the moment a request matches, the model loads the full instructions itself — you never invoke it by hand, and it costs no tokens until it is actually used.

The model loads Php File Audit on its own as soon as a request matches it.

Works with any AI model

AI skills are plain Markdown instructions rather than provider-specific code, so Php File Audit is not tied to the model it was written for. Install it once in TypingMind and use it with GPT-5, Claude, Gemini, Grok, DeepSeek, Mistral, Llama, or a local model you run yourself — all on your own API keys.

Loaded only when it is needed
The system prompt carries just the name and description. The instructions are fetched on the first matching request, so an idle skill costs nothing.
Switch models mid-chat
Because the skill is instructions rather than code, changing model does not break it — the next model reads the same SKILL.md.

Skill instructions

This is the SKILL.md content the model loads. Read it before installing — a skill is instructions your model will follow.

PHP 文件操作类漏洞源码审计

本 skill 聚焦源码层面判断"文件操作漏洞是否成立"，核心是验证路径可控性、内容可控性和执行可达性。构造上传绕过 payload、LFI 日志投毒等运行时利用技术属于对应黑盒 exploit skill 范畴。

深入参考

5 类文件漏洞的危险模式 / 安全模式代码对比 / EVID 证据示例 → references/file-vuln-patterns.md

Sink 分类决策树

根据遇到的 Sink 函数类型，进入不同审计分支:

Sink 函数	分支	典型严重度
`move_uploaded_file`, `copy($_FILES)`	文件上传	Critical-High
`include`/`require`/`include_once`/`require_once`	文件读取+执行	Critical
`file_get_contents`/`readfile`/`fread`/`highlight_file`	文件读取	High-Medium
`file_put_contents`/`fwrite`/`fopen('w')`	文件写入	Critical-High
`ZipArchive::extractTo`/`PharData::extractTo`	归档提取	High
`file_exists`/`is_file` + 后续操作	竞争条件	Medium-High

文件上传审计要点

上传漏洞本质是三要素同时满足: 可执行扩展名 + Web 可达存储路径 + 未被重命名/内容清洗。

扩展名验证: 黑名单容易遗漏 .phtml/.pht/.php5/.phar/.shtml，白名单更安全但要检查大小写处理逻辑
MIME vs Magic bytes: $_FILES['type'] 来自客户端完全可伪造；finfo_file()/getimagesize() 验证文件头但图片马（GIF89a + PHP 代码）可绕过
存储路径可控性: 用户是否能通过文件名中的 ../ 控制存储位置，跳出预定上传目录
Web 根可达性: 文件存储在 Web 根外则即使上传了 PHP 也无法直接执行
重命名策略: md5(time()) 等可预测命名可被猜解，random_bytes() 更安全

文件读取/包含审计要点

include 系列既读取又执行，危害远大于纯读取函数:

路径拼接模式: include($dir . '/' . $page . '.php') — 检查 $page 是否用户可控，../ 穿越是否被过滤
%00 截断: PHP < 5.3.4 可用 null 字节截断 .php 后缀；高版本已修复但审计遗留系统时仍需关注
Wrapper 利用: php://filter/convert.base64-encode/resource= 读取源码、php://input 注入代码、data:// 执行 payload
RFI 条件: allow_url_include=On 时远程文件包含成立，检查 php.ini 配置
纯读取函数: file_get_contents/readfile 虽不执行但可泄露敏感配置（数据库密码、API Key）

文件写入审计要点

写入漏洞需要三要素: 路径可控 + 内容可控 + 写入文件可被执行。

直接写 shell: file_put_contents($path, $content) 中两个参数都用户可控时，直接写入 Webshell
日志注入链: 日志记录用户输入 → 日志文件被 include 加载 → 间接代码执行。审查日志路径是否可预测、内容是否被过滤
配置文件覆盖: 写入 .htaccess（使 .jpg 被解析为 PHP）或 PHP 配置文件（注入代码到 <?php return [...];）
Session 文件利用: session.save_path 下的 session 文件内容部分用户可控，配合 LFI 实现 RCE

归档提取审计要点

Zip Slip: ZipArchive::extractTo() 不验证条目名称中的 ../../，恶意归档可向任意目录写文件
PharData: 与 ZipArchive 同理，extractTo() 存在路径穿越风险
安全解压: 解压前遍历条目名称，拒绝包含 .. 的路径；或解压到临时目录后逐文件校验移动

竞争条件审计要点

TOCTOU: is_file($path) 检查通过后、unlink($path) 执行前，攻击者替换文件为符号链接 → 删除任意文件
上传竞争: 文件先保存再校验删除，窗口期内发起大量并发请求访问已上传的 PHP 文件
符号链接跟随: file_get_contents($userPath) 若 $userPath 是符号链接则读取链接目标文件，绕过目录限制
原子操作: rename() 是原子操作可用于安全替换；先写临时文件再 rename 到目标位置可避免竞争

检测清单

Bundled files

The model reads these on demand while the skill is loaded. They are exposed as readable files and are never executed.

references/file-vuln-patterns.md9 KB

Frequently asked questions

What does the Php File Audit AI skill do?

Why use Php File Audit on TypingMind?

Because you install it once and use it with any model. Php File Audit is plain Markdown rather than provider-specific code, so the same skill runs on GPT-5, Claude, Gemini, Grok, or a local model — and you can switch model mid-chat without it breaking. TypingMind runs on your own API keys, so you pay providers directly instead of a per-seat subscription, and your skills and chats stay in your own storage.

How do I install Php File Audit in TypingMind?

Open Plugins → Skills → Install from GitHub in TypingMind and paste https://github.com/wgpsec/AboutSecurity/tree/master/skills/code-audit/php/php-file-audit. TypingMind reads its SKILL.md and bundles its files and installs it as a skill you can enable per chat.

Which AI models can use Php File Audit?

Any model you connect in TypingMind. AI skills are plain Markdown instructions rather than provider-specific code, so GPT, Claude, Gemini, Grok, and local models can all load this skill when a request matches it.

How many AI models can I use with Php File Audit?

As many as you like. As long as a model supports skills, you can use Php File Audit with it — GPT, Claude, Gemini, Grok, DeepSeek, Mistral, Llama and more — all on TypingMind with your own API keys.

Is the Php File Audit AI skill free?

It is published on GitHub by wgpsec. Check the repository for licensing terms. You only pay your own AI provider for the tokens you use.

What are AI skills?

An AI skill is a reusable instruction bundle that teaches an AI model how to do one specific task. It follows the open Agent Skills format: a SKILL.md file with a name and description, plus any scripts, templates or reference files the model may need. The model reads the instructions only when your request matches the skill, so an installed skill costs nothing until it is used.

How are AI skills different from plugins or MCP servers?

A plugin or MCP server gives a model new tools to call — code that runs somewhere and returns a result. An AI skill gives the model knowledge and process instead: how to approach a task, which steps to follow, what good output looks like. Skills are plain Markdown, so they need no server, no API key and no runtime, and they work with any model.

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Overview

Installation

Install in TypingMind

Install in another agent

Use it in TypingMind

Works with any AI model

Skill instructions

PHP 文件操作类漏洞源码审计

深入参考

Sink 分类决策树

文件上传审计要点

文件读取/包含审计要点

文件写入审计要点

归档提取审计要点

竞争条件审计要点

检测清单

Bundled files

Frequently asked questions

Related AI Skills

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