wordpress-cors-xmlrpc-rce-chain

wordpress-cors-xmlrpc-rce-chain is a skill for Claude Code, Codex from uphiago/recon-skills. It costs 36 tokens per session (1,130 once invoked), scanned A, original, MIT.

A security-testing procedure for checking whether WordPress CORS, XML-RPC, user roles, uploads, and file execution can combine into one attack path. CORS controls which websites can read responses, while XML-RPC is a WordPress remote-control interface.

In plain words
What is it for?
Use it to verify an authorized WordPress attack chain involving cross-origin data access, XML-RPC methods, upload permissions, and possible executable uploads.
Why use it?
It prevents treating an exposed feature as automatically vulnerable and requires evidence for every link in the chain. It also emphasizes authorization, test accounts, safe files, and cleanup.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to verify an authorized WordPress attack chain involving cross-origin data access, XML-RPC methods, upload permissions, and possible executable uploads.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/uphiago/recon-skills/wordpress-cors-xmlrpc-rce-chain
About the project

Recon Skills is a pack of security-testing skills covering reconnaissance, web applications, APIs, authentication, vulnerability validation, cloud infrastructure, and reporting. Security professionals use it for authorized assessments of systems they own or have written permission to test. The catalogue entries are individual skills from the pack.

uphiago/recon-skills · 1,254 stars · on GitHub · hiago.sh

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add uphiago/recon-skills --skill wordpress-cors-xmlrpc-rce-chain
Clone the repo
git clone --depth 1 https://github.com/uphiago/recon-skills

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for wordpress-cors-xmlrpc-rce-chain

README.md
[![agentmods](https://agentmods.dev/badge/skills/uphiago/recon-skills/wordpress-cors-xmlrpc-rce-chain/github.svg)](https://agentmods.dev/skills/uphiago/recon-skills/wordpress-cors-xmlrpc-rce-chain)
Your own site
<a href="https://agentmods.dev/skills/uphiago/recon-skills/wordpress-cors-xmlrpc-rce-chain"><img src="https://agentmods.dev/badge/skills/uphiago/recon-skills/wordpress-cors-xmlrpc-rce-chain/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for wordpress-cors-xmlrpc-rce-chain

Your own site · 80×15
<a href="https://agentmods.dev/skills/uphiago/recon-skills/wordpress-cors-xmlrpc-rce-chain"><img src="https://agentmods.dev/badge/skills/uphiago/recon-skills/wordpress-cors-xmlrpc-rce-chain.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 36 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,130 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium Data Exfiltration · line 76
    Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.
    Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00036 $0.01130
Opus 5 $0.00018 $0.00565
Sonnet 5 $0.00007 $0.00226
Haiku 4.5 $0.00004 $0.00113

Measured 8d ago against content hash 81bab479360e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

wordpress-cors-xmlrpc-rce-chain scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

compatibility: Requires curl, a browser, and approved WordPress test identities
redteam/wordpress-cors-xmlrpc-rce-chain/SKILL.md · 151 lines

How it starts

The opening of the file, as written. The whole thing — 151 lines — stays where its author put it; the contents beside it link to each section on GitHub.

WordPress CORS, XML-RPC, and Upload Chain

This skill evaluates whether independently verified WordPress behaviors can form a path to unauthorized file execution. It does not assume that CORS, XML-RPC, registration, or an upload method is exploitable merely because it is present.

When to Use

  • Credentialed CORS exposes non-public WordPress data.
  • XML-RPC returns a protocol-valid method list.
  • An approved test identity has an upload-capable role.
  • A plugin or core upload operation may accept an executable file.
  • The assessment explicitly permits state-changing upload and execution tests.

Prerequisites

  • Explicit authorization for each state-changing step.
  • An approved synthetic account and test site or disposable content.
  • Browser evidence for the CORS primitive.
  • Protocol-valid XML-RPC evidence.
  • Confirmed role capabilities and upload path.
  • A benign test artifact and cleanup procedure.

How to Run

Create an evidence matrix before sending a state-changing request:

Primitive                 State       Evidence
Credentialed CORS         observed    browser reads approved non-public data
XML-RPC method            observed    protocol-valid methodResponse
Upload-capable identity   unverified  role and capability still required
Executable storage path   unverified  handler and server behavior required
Cleanup                   planned     test artifact and account removal

Stop when any prerequisite remains inferred.

Procedure

1. Validate Credentialed CORS

Use hunt-cors to prove that an untrusted origin can read non-public data with an approved browser session. Header reflection or public REST content is not enough.

Record which information the primitive supplies to the next step. Usernames, nonces, or plugin metadata have different security value and may not enable authentication or upload.

2. Classify XML-RPC

TARGET="https://www.example.test"
OUTPUT_DIR="${OUTPUT_DIR:-./output/wordpress-chain}"
mkdir -p "$OUTPUT_DIR"

curl -sS --max-time 15 \
  -X POST "$TARGET/xmlrpc.php" \
  -H 'Content-Type: text/xml' \
  --data-binary \
  '<methodCall><methodName>system.listMethods</methodName></methodCall>' \
  -o "$OUTPUT_DIR/xmlrpc-methods.xml"

Read the full file on GitHub · 151 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 8d ago First seen · 151 lines · 36 tokens per session scan A 81bab479360e

Subscribe to this mod's changes

wordpress-cors-xmlrpc-rce-chain is a skill published in the GitHub repository uphiago/recon-skills (1,254 stars, last pushed 10d ago), licensed MIT. It adds 36 tokens to every session and 1,130 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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