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CVE-2025-62723

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Date: October 24, 2025

FlashMQ is a MQTT broker/server, designed for multi-CPU environments. Prior to version 1.23.2, any authenticated user can create sessions and have them collect QoS messages. When not sent to a client, these are then not released upon (eventual) session expiration. Version 1.23.2 fixes the issue.

Severity Score

Related Resources (5)

https://github.com/halfgaar/FlashMQ/commit/e86c49360ef4387440c97f591770cdb9284b4ee9
https://github.com/halfgaar/FlashMQ/issues/154
https://nvd.nist.gov/vuln/detail/CVE-2025-62723
https://github.com/halfgaar/FlashMQ/security/advisories/GHSA-7mhp-22q4-r6vv
https://www.mend.io/vulnerability-database/CVE-2025-62723

Severity Score

Weakness Type (CWE)

Missing Release of Resource after Effective Lifetime

CWE-772

Top Fix

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Upgrade Version

Upgrade to version https://github.com/halfgaar/FlashMQ.git - v1.23.1

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): LOW

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