Vulnerability Triage Process Training

Learn the systematic approach to triaging vulnerability reports in your disclosure program. Learn industry-standard processes for evaluation, prioritization, and response management.

Training Overview

This training covers the vulnerability triage lifecycle, from initial report receipt to resolution tracking. You'll learn standardized methodologies used by security teams.

Module 1: Triage Fundamentals

What is Vulnerability Triage?

Vulnerability triage is the systematic process of evaluating incoming security reports to determine their validity, severity, and priority for remediation. It involves technical assessment, risk evaluation, and resource allocation decisions.

Triage Team Structure

Effective triage requires a multi-disciplinary team with defined roles and responsibilities:

Module 2: Initial Assessment

Report Intake Process

The first 24-48 hours are critical for establishing effective communication and gathering initial information:

Scope Validation

Verify that the reported vulnerability falls within your program's defined scope:

Module 3: Technical Validation

Reproduction Process

Systematic approach to validating reported vulnerabilities:

Validation Steps:

1. Environment Setup
   • Use isolated testing environment
   • Mirror production configuration
   • Document test conditions

2. Reproduction Attempt
   • Follow provided steps exactly
   • Document each step and result
   • Test variations and edge cases

3. Impact Verification
   • Confirm claimed impact is achievable
   • Test exploit scenarios
   • Assess potential for escalation

4. Documentation
   • Record successful reproduction
   • Document failed attempts and reasons
   • Capture evidence (screenshots, logs)

5. Validation Decision
   • Confirmed: Vulnerability exists as described
   • Partial: Vulnerability exists but impact differs
   • Invalid: Cannot reproduce or not a vulnerability

Common Validation Challenges

• Environment Differences: Production vs. testing environment discrepancies
• Incomplete Information: Missing reproduction steps or context
• Timing Issues: Race conditions or timing-dependent vulnerabilities
• Configuration Specifics: Vulnerability exists only in specific configurations

Module 4: Risk Assessment and CVSS Scoring

CVSS 3.1 Scoring Framework

Use the Common Vulnerability Scoring System to assign standardized severity ratings:

Severity Classification

Business Impact Assessment

Consider additional factors beyond technical CVSS scoring:

• Data Sensitivity: Personal, financial, or regulated data exposure
• System Criticality: Core business functions or infrastructure
• Public Exposure: Internet-facing vs. internal systems
• Compliance Requirements: Regulatory or contractual obligations
• Exploit Availability: Public exploits or attack tools

Module 5: Prioritization and Resource Allocation

Priority Matrix

Use a systematic approach to prioritize vulnerabilities based on multiple factors:

Resource Assignment

Match appropriate resources to vulnerability priority and complexity:

• Senior Developer: Critical and complex vulnerabilities
• Mid-level Developer: High-priority standard fixes
• Junior Developer: Low-complexity, well-defined issues
• Security Team: Validation and verification support
• Architecture Team: Design-level security issues

Module 6: Communication Management

Researcher Communication

Maintain clear, professional communication throughout the triage process:

Stakeholder Updates

Keep internal stakeholders informed of triage decisions and progress:

• Executive Dashboard: High-level metrics and critical issues
• Development Teams: Assigned vulnerabilities and timelines
• Security Team: Detailed triage decisions and technical analysis
• Compliance Team: Regulatory implications and requirements

Module 7: Tracking and Metrics

Key Performance Indicators

Reporting Dashboard

Maintain visibility into program performance with regular reporting:

Practical Exercises

Exercise 1: SQL Injection Triage

Exercise 2: Cross-Site Scripting Assessment

Advanced Topics

Zero-Day Management

Special considerations for novel vulnerabilities:

• Threat Intelligence: Check for active exploitation in the wild
• Vendor Coordination: Coordinate with third-party vendors if applicable
• Disclosure Timeline: Balance fix development with responsible disclosure
• Media Management: Prepare for potential public attention

Chained Vulnerabilities

Assess combinations of vulnerabilities that create higher impact:

• Evaluate cumulative risk of vulnerability chains
• Consider attack paths and privilege escalation
• Adjust CVSS scoring for combined impact
• Coordinate remediation across multiple teams

Continuous Improvement

Post-Incident Reviews

Learn from each vulnerability to improve your triage process:

Training Updates

• Regular team training on new vulnerability types
• Updated CVSS guidelines and scoring examples
• Industry best practice sharing and benchmarking
• Tool training for triage automation and management