Day 28 of 60
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Dynamic, fuzz & dynamic security
Authorization regression testing
Most data leaks aren't from missing auth. They're from existing auth quietly forgetting to check on the seventh new endpoint. A role × object × action matrix is how you stop forgetting.
ProblemUsers can read or mutate records, fields, or admin functions they should never reach.
How it works
Define a role × object × action matrix and run it against real APIs with seeded users and records. Cover object-level, property-level, and function-level authorization separately; fail closed on every new endpoint.
What it catches
BOLA, BOPLA, broken function-level authorization, tenant isolation leaks, mass-assignment exposure, and accidental admin-path exposure.
Tools
OWASP ZAP scripts · OSS PactumJS · OSS Postman / Newman · Hybrid Schemathesis hooks · OSS
Verdict by project size
Small
Opt
Medium
Must
Large
Must
Extra-large
Must
Cost
| Project size | Setup | Maint / mo | Tool / mo | CI / run |
|---|---|---|---|---|
| Small <10k LOC | 4h | 1h | $0 | +1m |
| Medium 10–100k LOC | 2d | 5h | $0 | +3m |
| Large 100k–1M LOC | 8d | 25h | $500 | +8m |
| Extra-large >1M LOC | 25d | 100h | $5k | +15m |
Setup = engineer-days to first useful run ·
Maint = engineer-hours / month at steady state ·
Tool = out-of-pocket $ / month ·
CI = minutes added (or saved) per pipeline run
Lifecycle & ownership
When in lifecycle
Test Release
Per pull request · Runs in CI on every PR; gates merge.
Who owns it
Security / AppSec
SAST, DAST, threat modelling
Collaborates with: Developer, QA / Test Engineer
Reference implementations
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OWASP Juice Shop access-control challenges
Broken access-control scenarios for role, object, and function-level testing.
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OWASP WebGoat access-control lessons
Training app with broken access-control lessons for validating authz thinking.
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PortSwigger access control labs
Hands-on broken access-control examples for object and function authorization.
Quick check
Authorization regression testing covers which classes of bug?
One question. Pick the best answer. Your streak is saved locally on this device.
Save the lesson
Download SVG ↓
Screenshot for a 1:1, drop it in Slack, or download the SVG.