CVE-2025-59934
CRITICALformbricks < 4.0.1 - Unauthenticated Authentication Bypass via JWT Signature Verification Missing
Title source: llmExploitation Summary
EIP tracks 1 public exploit for CVE-2025-59934. PoCs published by suriryuk.
AI-analyzed exploit summary The repository contains only a minimal README with no exploit code, technical details, or functional PoC. It is a placeholder with no substantive content.
Description
Formbricks is an open source qualtrics alternative. Prior to version 4.0.1, Formbricks is missing JWT signature verification. This vulnerability stems from a token validation routine that only decodes JWTs (jwt.decode) without verifying their signatures. Both the email verification token login path and the password reset server action use the same validator, which does not check the token’s signature, expiration, issuer, or audience. If an attacker learns the victim’s actual user.id, they can craft an arbitrary JWT with an alg: "none" header and use it to authenticate and reset the victim’s password. This issue has been patched in version 4.0.1.
Exploits (1)
The repository contains only a minimal README with no exploit code, technical details, or functional PoC. It is a placeholder with no substantive content.
References (4)
Scores
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L