CVE-2025-62723
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-10-24

Last updated on: 2025-10-31

Assigner: GitHub, Inc.

Description
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.
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Meta Information
Published
2025-10-24
Last Modified
2025-10-31
Generated
2026-06-16
AI Q&A
2025-10-24
EPSS Evaluated
2026-06-15
NVD
CVE-2025-62723
EUVD
EUVD-2025-35890
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
flashmq flashmq to 1.23.2 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-772 The product does not release a resource after its effective lifetime has ended, i.e., after the resource is no longer needed.
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Executive Summary

The vulnerability in FlashMQ prior to version 1.23.2 allows any authenticated user to create sessions that collect QoS messages. These messages, when not sent to a client, are not released even after the session expires, potentially leading to resource exhaustion or denial of service. Version 1.23.2 fixes this issue.

Impact Analysis

This vulnerability can impact you by causing resource exhaustion on the MQTT broker/server, as QoS messages accumulate in sessions that are not properly cleaned up after expiration. This could lead to degraded performance or denial of service conditions.

Mitigation Strategies

Upgrade FlashMQ to version 1.23.2 or later, as this version fixes the issue where authenticated users can create sessions that collect QoS messages which are not released upon session expiration.

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