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perl-security

Enforce taint-aware input handling and injection-resistant patterns in Perl programs.

1|Updated Mar 3, 2026
Search Tags:#sql injection#security review#command injection#perl#xss prevention#taint mode#perlcritic
One-click install
npx skills add https://github.com/samymity/bridge-ventures-backend --skill perl-security-samymity
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: perl-security
Source: https://github.com/samymity/bridge-ventures-backend/tree/main/.claude/skills/perl-security
Command: npx skills add https://github.com/samymity/bridge-ventures-backend --skill perl-security-samymity

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Perl applications often fail security basics (tainted input, unsafe regexes, command/path injection, SQLi, and unencoded output), leading to exploitable vulnerabilities in web and backend code.

Core Features & Use Cases

  • Taint-mode & input boundaries: teaches taint-aware execution patterns and safe untainting via strict allowlists and regex validation.
  • Injection-resistant coding: covers safe process execution (list-form system/exec, IPC approaches), secure file operations (three-arg open, TOCTOU/path traversal protections), and DBI SQL parameterization (including dynamic column allowlists).
  • Web security & output handling: provides patterns for XSS-safe encoding by context (HTML/URL/JSON), CSRF token generation guidance, and defensive HTTP/session/header configuration.
  • Security tooling enforcement: supplies security-focused perlcritic policy configurations to catch insecure Perl patterns during review and CI.

Quick Start

Use the perl-security skill to produce a security review plan for your Perl web endpoints that validates and untaints user input, parameterizes every DBI query, and ensures all output is context-encoded.

Frequently Asked Questions about perl-security

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I prevent SQL injection in Perl DBI scripts?▼

To prevent SQL injection in Perl DBI scripts, you must use DBI placeholders to parameterize every database query. This separates SQL structure from user input, ensuring tainted data cannot manipulate the executed statements and stopping injection attacks.

What is taint mode in Perl and how does it stop input injection?▼

Taint mode in Perl is a security mechanism that marks all external input as unsafe. It stops injection by forcing developers to untaint user data via strict allowlists and regex validation before that data can affect file or system operations.

How do I securely untaint user input in Perl without creating vulnerabilities?▼

Securely untaint user input in Perl by applying strict allowlist-based validation and safe regex patterns. Explicitly match expected formats and capture the validated data, avoiding broad expressions that could expose the application to ReDoS vulnerabilities.

What is the best way to prevent command injection in Perl system calls?▼

The best way to prevent command injection in Perl system calls is to use list-form process execution. By passing arguments as lists to system or exec, you bypass the shell entirely, ensuring user input is treated strictly as data.

How do I prevent XSS when outputting user data in Perl web applications?▼

To prevent XSS in Perl web applications, apply context-aware output encoding for HTML, URL, and JSON contexts. You must also generate CSRF tokens and configure defensive HTTP headers to ensure tainted data is safely rendered.

Can I use perlcritic to enforce Perl security policies during code review?▼

Yes, you can use perlcritic to enforce Perl security policies during code review and CI. Security-focused perlcritic policy configurations automatically catch insecure Perl patterns, ensuring injection-resistant coding standards are maintained.

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