CVE-2026-39923
Flarum < 1.8.16 Password Reset Token Expiry Bypass via POST /reset
CVSS Score
8.1
EPSS Score
0.0%
EPSS Percentile
0th
Flarum before 1.8.16 contains a password reset token expiry bypass vulnerability that allows unauthenticated attackers to reuse expired password reset tokens by submitting them directly to the reset processing endpoint. The SavePasswordController::handle() method calls PasswordToken::findOrFail() without performing any expiry validation, allowing attackers to bypass the 24-hour token lifetime enforced only during form rendering and change any account's password to gain an authenticated session.
| CWE | CWE-324 |
| Vendor | flarum |
| Product | flarum framework |
| Published | Aug 5, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
Flarum / Flarum Framework
0 < 1.8.16
References
github.com: https://github.com/flarum/framework/releases/tag/v1.8.16 github.com: https://github.com/flarum/framework/pull/4545 github.com: https://github.com/flarum/framework/commit/2803058d0f9dc38252326070b46d4484fe5a857d vulncheck.com: https://www.vulncheck.com/advisories/flarum-password-reset-token-expiry-bypass-via-post-reset
Credits
Hamed Kohi VulnCheck