Race Condition Hackviser ((better)) (SAFE)

Hackviser (CTF / Bug Bounty simulation) Vulnerability Type: Time-of-Check to Time-of-Use (TOCTOU) Race Condition Endpoint: /api/redeem (POST) Parameter: coupon_code (single-use) Impact: Unlimited redemption of the same one-time coupon.

A is a subtle yet high-impact vulnerability that occurs when a system’s behavior depends on the uncontrolled sequence or timing of concurrent events. While many developers treat them as rare glitches, platforms like Hackviser highlight them as critical business logic flaws that allow attackers to bypass limits, escalate privileges, or corrupt data. What is a Race Condition? race condition hackviser

# Start all threads as close together as possible for t in threads: t.start() Hackviser (CTF / Bug Bounty simulation) Vulnerability Type: