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.
References
- www.cve.org/CVERecord ↗
- nvd.nist.gov/vuln/detail/CVE-2026-39923 ↗
- github.com/flarum/framework/commit/2803058d0f9dc38252326070b46d4484fe5a857d ↗
- github.com/flarum/framework/pull/4545 ↗
- github.com/flarum/framework/releases/tag/v1.8.16 ↗
- www.vulncheck.com/advisories/flarum-password-reset-token-expiry-bypass-via-post-reset ↗
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This product uses the NVD API but is not endorsed or certified by the NVD. CVSS scores do not establish exploitation.