Unicode Normalization and Cookie Path Precedence - Solution to February (Valentines) '24 Challenge

Опубликовано: 13 Май 2025
на канале: Intigriti

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🏆 The official writeup for the February '24 Challenge, which involves unicode normalisation (DOMPurify bypass), XSS and cookie manipulation (path precedence). We received 32 valid submissions (and 7 awesome writeups), many of which exploited an unintended race condition 👀 In this video, we'll breakdown the solution 🧠

Full blog/writeup: https://bugology.intigriti.io/intigri...
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00:00 Intro
00:45 Explore site functionality
04:24 Source code review
09:45 Attack plan
11:22 XSS via DOMPurify bypass (unicode normalisation bug)
15:32 Cookie manipulation (path precedence)
18:36 Bonus: unintended solution (race condition)
20:22 Summary
20:51 Conclusion