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.

CVSS Scores

EPSS Scores

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Meta Information

Published

2025-10-24

Last Modified

2025-10-31

Generated

2026-07-06

AI Q&A

2025-10-24

EPSS Evaluated

2026-07-05

NVD

CVE-2025-62723

EUVD

EUVD-2025-35890

Affected Vendors & Products

Vendor	Product	Version / Range
flashmq	flashmq	to 1.23.2 (exc)

Helpful Resources

Exploitability

CWE

KEV

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.

Attack-Flow Graph

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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