# Critical Security Bug: Authentication Bypass in SIWB

**URL:** <https://forum.dfinity.org/t/critical-security-bug-authentication-bypass-in-siwb/43927>\
**Category:** Developers\
**Tags:** security, dev, authentication\
**Created:** [April 16, 2025, 10:04am UTC](https://forum.dfinity.org/t/critical-security-bug-authentication-bypass-in-siwb/43927 "2025-04-16T10:04:59Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![robin-kunzler](https://sea1.discourse-cdn.com/flex023/user_avatar/forum.dfinity.org/robin-kunzler/32/3249_2.png) [@robin-kunzler](https://forum.dfinity.org/u/robin-kunzler)\
**Post date:** [April 24, 2025, 11:24am UTC](https://forum.dfinity.org/t/critical-security-bug-authentication-bypass-in-siwb/43927/3 "2025-04-24T11:24:37Z")

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See also this broader discussion: [Critical Vulnerability in Sign-In With Bitcoin (SIWB) used to Attack Odin.fun - Learnings and Discussion](https://forum.dfinity.org/t/critical-vulnerability-in-sign-in-with-bitcoin-siwb-used-to-attack-odin-fun-learnings-and-discussion/44721)

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_[View the full topic](https://forum.dfinity.org/t/critical-security-bug-authentication-bypass-in-siwb/43927)._