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This page aggregates cross-platform resources to practice Race Conditions: retired Hack The Box machines, PortSwigger Web Security Academy labs and TryHackMe rooms, plus curated resources (HackTricks, PortSwigger, etc.) and related skills. Coverage: 16 challenges across 3 platforms — 3 HackTheBox · 7 PortSwigger · 6 TryHackMe. 3 with a Spanish writeup, 3 with a video writeup.

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Where to start

Ordered by actual difficulty. At the same level: isolated lab first, then the guided room, and the full machine last.
  1. PortSwigger — Limit overrun race conditions (Apprentice) · 🇬🇧
  2. PortSwigger — Partial construction race conditions (Apprentice) · 🇬🇧
  3. PortSwigger — Web shell upload via race condition (Apprentice) · 🇬🇧
  4. TryHackMe — 25 Days of Cyber Security (Easy · ~45 min) · 🇬🇧
  5. TryHackMe — Advent of Cyber 2 [2020] (Easy · ~45 min) · 🇬🇧
  6. TryHackMe — Advent of Cyber 2024 (Easy · ~1440 min) · 🇬🇧

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Curated resources

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HTB machines practicing Race Conditions (3)

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PortSwigger labs practicing Race Conditions (7)

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TryHackMe rooms practicing Race Conditions (6)

← Back to the full glossary Last updated: 2026-08-17