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.
History

Fri, 14 Aug 2026 17:15:00 +0000

Type Values Removed Values Added
First Time appeared Flarum flarum
CPEs cpe:2.3:a:flarum:flarum:*:*:*:*:*:*:*:*
Vendors & Products Flarum flarum

Fri, 07 Aug 2026 09:45:00 +0000

Type Values Removed Values Added
First Time appeared Flarum
Flarum framework
Vendors & Products Flarum
Flarum framework

Wed, 05 Aug 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 05 Aug 2026 15:30:00 +0000

Type Values Removed Values Added
Description 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.
Title Flarum < 1.8.16 Password Reset Token Expiry Bypass via POST /reset
Weaknesses CWE-324
References
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.2, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-08-05T14:38:35.604Z

Updated: 2026-08-14T16:49:48.066Z

Reserved: 2026-04-07T20:57:06.210Z

Link: CVE-2026-39923

cve-icon Vulnrichment

Updated: 2026-08-05T19:35:52.666Z

cve-icon NVD

Status : Deferred

Published: 2026-08-05T16:16:55.980

Modified: 2026-09-09T20:35:08.537

Link: CVE-2026-39923

cve-icon Redhat

No data.