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CVE-2026-39923

Flarum < 1.8.16 Password Reset Token Expiry Bypass via POST /reset

Published: Aug 5, 2026Updated: Aug 5, 2026 Sources: CVE List NVDCWE-324
8.1HIGH
NVD MITRE
EPSS Score
0.3%
Top 82.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:HPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-324

Affected Products

Flarum
oss-project·SG
Flarum FrameworkOn-prem
Web & CMS Plugins / forum-wiki

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.
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References

https://github.com/flarum/framework/commit/2803058d0f9dc38252326070b46d4484fe5a857d
github.com
https://github.com/flarum/framework/pull/4545
github.com
https://github.com/flarum/framework/releases/tag/v1.8.16
github.com
and 1 more references View all →

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