foospidy/payloads: The 13GB Security Payload Archive Every Pentester Should Know About

Hook

What if you could download every major XSS, SQLi, and command injection payload ever catalogued by security researchers—all 13 gigabytes of them—with a single shell script?

Context

Before centralized payload repositories, penetration testers and security researchers faced a fragmented landscape. Finding effective attack strings meant bookmarking dozens of blog posts, maintaining personal notes from conference talks, and cherry-picking payloads from scattered GitHub repos. When you needed to test for CRLF injection or hunt for default SCADA passwords, you'd spend as much time gathering ammunition as actually testing.

This fragmentation wasn't just inconvenient—it was a competitive disadvantage. Bug bounty hunters who maintained better organized collections found vulnerabilities faster. Red teamers with comprehensive payload databases bypassed WAFs more effectively. The security community needed what open source does best: aggregate, standardize, and distribute knowledge freely. Enter foospidy/payloads, a meta-repository that treats payload collection as a data aggregation problem rather than asking yet another security researcher to reinvent the wheel.

Technical Insight

The architecture of foospidy/payloads is deliberately minimal—a feature, not a bug. At its core sits get.sh, a 200-line shell script that orchestrates downloads from 30+ upstream sources. This design choice reveals an important philosophy: don't duplicate effort, curate it. The script clones repositories like fuzzdb, SecLists, and PayloadsAllTheThings, then reorganizes their contents into a predictable directory structure.

Here's a simplified version of how the aggregation works:

#!/bin/bash
# Core pattern from get.sh

BASE_DIR="payloads"
mkdir -p "${BASE_DIR}/xss" "${BASE_DIR}/sqli" "${BASE_DIR}/traversal"

# Clone upstream source
git clone --depth 1 https://github.com/swisskyrepo/PayloadsAllTheThings temp_payloads

# Extract and reorganize
find temp_payloads/XSS\ Injection -name '*.txt' -exec cp {} "${BASE_DIR}/xss/" \;
find temp_payloads/SQL\ Injection -name '*.txt' -exec cp {} "${BASE_DIR}/sqli/" \;

# Cleanup
rm -rf temp_payloads

The result is a flattened hierarchy organized by attack vector rather than by source. This matters when you're in the middle of testing—you think in terms of "I need XXE payloads" not "I need to check what danielmiessler included in SecLists." The directory structure becomes your mental model: xss/, sqli/, traversal/, command-injection/, each containing hundreds to thousands of text files.

What makes this collection particularly valuable is its inclusion of real-world artifacts. Beyond synthetic fuzzing strings, you'll find packet captures from MACCDC (Mid-Atlantic Collegiate Cyber Defense Competition) and DEFCON CTF events. These PCAPs contain actual attack traffic, showing not just payload strings but complete HTTP conversations with headers, encoding variations, and multi-stage exploitation chains. For researchers studying WAF bypasses or building detection systems, this context is gold.

The payload variety spans from obvious injections to esoteric bypasses. For SQL injection alone, you'll encounter everything from basic ' OR '1'='1 strings to time-based blind injection vectors, second-order injection payloads, and database-specific syntax variations across MySQL, PostgreSQL, Oracle, and MSSQL. Cross-site scripting payloads include not just alert boxes but vectors targeting specific JavaScript contexts—event handlers, script blocks, attribute injections, and DOM-based sinks.

One underappreciated collection is the default credentials database. While many know about generic admin/admin combinations, this repo includes hundreds of default passwords for industrial control systems (ICS), SCADA devices, and embedded systems—equipment that often ships with hardcoded credentials and never gets updated. For infrastructure penetration tests, these lists are invaluable.

The aggregation approach creates an interesting technical challenge: deduplication. Run get.sh and you'll notice the same <script>alert(1)</script> payload appears dozens of times across different source files. This isn't necessarily wasteful—different sources include the same payload for different reasons, with different surrounding context. One researcher might include it as a baseline test while another uses it to demonstrate filter bypass evolution. The redundancy becomes a form of implicit ranking: payloads that appear across multiple authoritative sources are likely more effective or widely applicable.

Gotcha

The biggest limitation is exactly what you'd expect from a 13GB text file dump: no interface, no search, no intelligence layer. Want to find all polyglot payloads that work as both XSS and SQLi? Fire up grep and start pattern matching. Looking for payloads that bypass a specific WAF? You'll need external knowledge about which payloads work against which defenses—nothing in the repository tells you.

More problematic is the lack of freshness guarantees. The repository depends on upstream sources remaining available and maintained. Several sources in the original get.sh point to repositories that have been archived or moved. When you run the download script, some sources will 404, leaving gaps in your collection. There's no checksums, no version pinning, no guarantee that what you download today matches what someone else downloaded last month. For reproducible security research, this is a real problem.

Payload quality varies wildly. Some files contain carefully curated, battle-tested strings while others appear to be brain-dumps from individual pentesters. There's no peer review process, no effectiveness ratings, no "this payload found CVE-XXXX" metadata. You're getting raw materials, not refined tools. For beginners, this is overwhelming—thousands of payloads with no guidance on which to try first. Even experienced testers may waste time trying obsolete bypasses that worked against 2015-era filters but fail against modern WAFs with ML-based detection.

Verdict

Use if: You're building custom fuzzing tools and need diverse input corpora; you're conducting manual penetration tests and want comprehensive payload references at your fingertips; you're researching attack pattern evolution and need historical payload data; or you're setting up a security lab and want a one-command payload library download. This repo shines when you have the expertise to curate and contextualize the raw materials yourself. Skip if: You need an automated testing framework (look at Nuclei or Jaeles instead); you're learning offensive security and need educational content with explanations (PayloadsAllTheThings with its methodology guides is better); you want validated, ranked payloads optimized for specific tools (Burp Suite's commercial wordlists or Seclists' more structured approach); or you need actively maintained collections with community feedback loops. This is a reference library, not a learning resource or turnkey solution.