Catalog/VULNERABILITY/auth-bypass
SCAN-ID: AUTH-BYPASSREVISION 2026.4
VULNERABILITYCVSS 8.5 (HIGH)

Authentication & Session Hijacking Scanner

Test password reset flows, session fixation, credential transit over HTTP, and rate-limiting thresholds.

Technical Scope & Verification Behavior

Verifies session token regeneration after login, checks password reset token entropy, and validates sliding window login throttles.

Automated Inspection Checks (12)
Passive URL parameter fuzzing
Non-destructive boundary tests
Header & cookie flag assertions
Differential latency timing

Proof of Concept (PoC) Vector

Canonical test payload dispatched during security surface audits.

POST /api/login with 200 consecutive attempts without 429

Probe Execution Simulator

Watch the probe engine test this signature in an isolated sandbox.

probe-runner (isolated ephemeral container)
Click 'Simulate Check' to watch the headless audit engine test this vector.

Remediation Patch

Sliding Window Rate Limiter

patch.diff (typescript)
--- a/handler.typescript (Vulnerable)
app.post('/api/login', async (req, res) => { /* no throttle */ });
+++ b/handler.typescript (Remediated)
import { rateLimit } from 'express-rate-limit';
app.post('/api/login', rateLimit({ windowMs: 15 * 60 * 1000, max: 5 }), handler);

Apply tight sliding-window rate limits on authentication endpoints to prevent credential stuffing.

AI Agent Prompt (Cursor · Claude · Copilot)

Copy and paste into your editor to refactor this issue automatically.

"Install Redis-backed sliding-window rate limiting on /api/login and /api/auth/forgot-password."

Run Isolated Check

Test your public domain specifically for Authentication & Session Hijacking Scanner.

100% passive • No server load

Specification Details

CVSS Score
8.5 / 10.0
Severity Level
HIGH
Category
VULNERABILITY
Test Vectors
12 automated
Execution SLA
< 2.5 seconds
False Positive Defense
Strict assertion
Related Standards
#Authentication#Brute Force#Sessions

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