Web Xxe
s0ld13rr/pentestcode
XML External Entity injection detection→file-read/SSRF→proof for web apps.
XML external entity injection for file read, SSRF, and DoS. An agent skill from NeoTheCapt/RedteamAgent.
Install Xxe Testing
$ npx skills add NeoTheCapt/RedteamAgent --skill xxe-testing -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install NeoTheCapt/RedteamAgent xxe-testing --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/NeoTheCapt/RedteamAgent.git skills-src && mkdir -p .claude/skills && cp -r skills-src/agent/skills/xxe-testing .claude/skills/xxe-testing && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "xxe-testing" agent skill from https://github.com/NeoTheCapt/RedteamAgent/tree/master/agent/skills/xxe-testing into .claude/skills/xxe-testing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "xxe-testing", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/NeoTheCapt/RedteamAgent/tree/master/agent/skills/xxe-testingType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add NeoTheCapt/RedteamAgent --skill xxe-testing -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install NeoTheCapt/RedteamAgent xxe-testing --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/NeoTheCapt/RedteamAgent.git skills-src && mkdir -p .agents/skills && cp -r skills-src/agent/skills/xxe-testing .agents/skills/xxe-testing && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "xxe-testing" agent skill from https://github.com/NeoTheCapt/RedteamAgent/tree/master/agent/skills/xxe-testing into .agents/skills/xxe-testing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "xxe-testing", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add NeoTheCapt/RedteamAgent --skill xxe-testing -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install NeoTheCapt/RedteamAgent xxe-testing --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/NeoTheCapt/RedteamAgent.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/agent/skills/xxe-testing .cursor/skills/xxe-testing && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "xxe-testing" agent skill from https://github.com/NeoTheCapt/RedteamAgent/tree/master/agent/skills/xxe-testing into .cursor/skills/xxe-testing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "xxe-testing", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/NeoTheCapt/RedteamAgent.git --path agent/skills/xxe-testing--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add NeoTheCapt/RedteamAgent --skill xxe-testing -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install NeoTheCapt/RedteamAgent xxe-testing --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/NeoTheCapt/RedteamAgent.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/agent/skills/xxe-testing .gemini/skills/xxe-testing && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "xxe-testing" agent skill from https://github.com/NeoTheCapt/RedteamAgent/tree/master/agent/skills/xxe-testing into .gemini/skills/xxe-testing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "xxe-testing", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install NeoTheCapt/RedteamAgent xxe-testingInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add NeoTheCapt/RedteamAgent --skill xxe-testing -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/NeoTheCapt/RedteamAgent.git skills-src && mkdir -p .github/skills && cp -r skills-src/agent/skills/xxe-testing .github/skills/xxe-testing && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "xxe-testing" agent skill from https://github.com/NeoTheCapt/RedteamAgent/tree/master/agent/skills/xxe-testing into .github/skills/xxe-testing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "xxe-testing", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add NeoTheCapt/RedteamAgent --skill xxe-testing -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install NeoTheCapt/RedteamAgent xxe-testing --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/NeoTheCapt/RedteamAgent.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/agent/skills/xxe-testing .opencode/skills/xxe-testing && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "xxe-testing" agent skill from https://github.com/NeoTheCapt/RedteamAgent/tree/master/agent/skills/xxe-testing into .opencode/skills/xxe-testing/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "xxe-testing", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
xxe-testing- GitHub stars
- 140
- Token cost
- ~1k tokens
- SKILL.md length
- 425 words
- Files
- 1
- Skills in repo
- 25
- Repo updated
- First seen
- Licence
- None found
At a glance
XML external entity injection for file read, SSRF, and DoS. An agent skill from NeoTheCapt/RedteamAgent.
- Works in 8 steps: Identify XML Input Points → Classic XXE — File Read → SSRF via XXE → …
- Tasks that involve Web application vulnerabilities
- SKILL.md covers When to Activate, Tools, Methodology and What to Record
- Reaches w3.org
What it does
Xxe Testing is an agent skill from NeoTheCapt/RedteamAgent. XML external entity injection for file read, SSRF, and DoS
Its SKILL.md is about 1k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Security, covering Web application vulnerabilities and Penetration testing. It works with Microsoft Excel and Microsoft Word. The repository describes itself as: An AI red-team agent for authorized labs and web app pentesting workflows. Turns Claude Code / OpenCode / Codex into a structured recon → test → exploit → report workflow, with…
When your agent uses it
- Tasks that involve Web application vulnerabilities
- Tasks that involve Penetration testing
Example prompts
- “/xxe-testing”
Workflow steps
8 steps, taken from the step headings in SKILL.md.
- Identify XML Input Points
- Classic XXE — File Read
- SSRF via XXE
- Blind XXE — Out-of-Band
- Denial of Service
- Bypass Techniques
- SVG / Office File XXE
- CTF / Juice Shop Recall Contract
What it can do on your machine
Read from SKILL.md and the folder at commit 2e60476. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
Hosts in commands or code, which the agent is likely to contact:
w3.org
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Xxe Testing loads about 1k tokens when it runs. Until then it costs about 18 tokens; SKILL.md has 425 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Without a licence we can't republish the file, so here is its outline and opening line. It has 425 words (~1,023 tokens).
“xml <?xml version="1.0"?> <!DOCTYPE foo [ <!ENTITY xxe SYSTEM "file:///etc/passwd"> ]>”
- name
- xxe-testing
- origin
- RedteamOpencode
Files
Just SKILL.md in agent/skills/xxe-testing of NeoTheCapt/RedteamAgent.
Open the folder on GitHubat commit 2e60476
Compare with similar skills
Xxe Testing next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Xxe Testing this skillNeoTheCapt/RedteamAgent | 140 | — | ~1k | Automated safety check: Pass | None | |
| Web Xxes0ld13rr/pentestcode | 817 | — | ~585 | Automated safety check: Pass | MIT | |
| Strix Code Vulnerability Scanusestrix/strix | 67k | — | ~1.1k | Automated safety check: Pass | Apache-2.0 | |
| Code Audit3stoneBrother/code-audit | 893 | 1 repos | ~2.7k | Automated safety check: Pass | None | |
| Fix Strix Security Findingsusestrix/strix | 67k | — | ~1.5k | Automated safety check: Pass | Apache-2.0 | |
| Wooyun Legacytanweai/wooyun-legacy | 1.8k | — | ~1.9k | Automated safety check: Pass | Custom licence |
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Fix Strix Security Findings
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Related
Works with
Categories
Questions about Xxe Testing
What does Xxe Testing do?
XML external entity injection for file read, SSRF, and DoS. An agent skill from NeoTheCapt/RedteamAgent. Xxe Testing is an agent skill from NeoTheCapt/RedteamAgent.
When should I use Xxe Testing?
Xxe Testing fits situations like: tasks that involve Web application vulnerabilities; tasks that involve Penetration testing.
How do I install Xxe Testing in Claude Code?
Run `npx skills add NeoTheCapt/RedteamAgent --skill xxe-testing -a claude-code`. Or copy the skill folder (agent/skills/xxe-testing in NeoTheCapt/RedteamAgent) into .claude/skills/xxe-testing in your project. Claude Code loads it when a task matches its description.
How do I install Xxe Testing in Codex?
Run `npx skills add NeoTheCapt/RedteamAgent --skill xxe-testing -a codex`. Or copy the skill folder (agent/skills/xxe-testing in NeoTheCapt/RedteamAgent) into .agents/skills/xxe-testing in your project. Codex loads it when a task matches its description.
Can I use Xxe Testing in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add NeoTheCapt/RedteamAgent --skill xxe-testing -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/xxe-testing, .gemini/skills/xxe-testing, .github/skills/xxe-testing and .opencode/skills/xxe-testing in your project.
What does Xxe Testing need to run?
SKILL.md names no scripts, command-line tools or credentials: Xxe Testing is instructions for the agent only.
Does Xxe Testing access the network?
SKILL.md names 1 domain. In commands or code: w3.org; the agent is likely to contact it when it follows the instructions. This is read from the text; nothing was executed.
Is Xxe Testing safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Xxe Testing use?
No licence was found for Xxe Testing or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Xxe Testing use?
About 1k tokens (SKILL.md is roughly 4.1k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Xxe Testing?
Skills that share tags, products or a category with Xxe Testing: Web Xxe (s0ld13rr/pentestcode, 817 stars), Strix Code Vulnerability Scan (usestrix/strix, 67k stars), Code Audit (3stoneBrother/code-audit, 893 stars) and Fix Strix Security Findings (usestrix/strix, 67k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Xxe Testing?
NeoTheCapt (a GitHub user) maintains it in NeoTheCapt/RedteamAgent, which has 140 GitHub stars. The repository holds 25 skills in this directory. The repository was last updated on August 2, 2026.
Source: NeoTheCapt/RedteamAgent on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.