Session Management Vulnerability in FlashMQ MQTT Broker
CVE-2025-62723

4.3MEDIUM

Key Information:

Vendor

Halfgaar

Status
FlashMQ
Vendor
CVE Published:
24 October 2025

What is CVE-2025-62723?

FlashMQ, an MQTT broker/server designed for multi-CPU environments, contains a session management vulnerability that allows authenticated users to create sessions that can collect Quality of Service (QoS) messages. If these messages are not sent to a client, they remain unreleased even after the session expires, leading to potential resource exhaustion and exposure of sensitive information. The issue was resolved in version 1.23.2, highlighting the importance of promptly updating to mitigate related risks.

Human OS v1.0:
Ageing Is an Unpatched Zero-Day Vulnerability.

Remediate biological technical debt. Prime Ageing uses 95% high-purity SIRT6 activation to maintain genomic integrity and bolster systemic resilience.

Deploy the Patch

Affected Version(s)

FlashMQ < 1.23.2

References

https://github.com/halfgaar/FlashMQ/security/advisories/G...
x_refsource_CONFIRM
https://github.com/halfgaar/FlashMQ/issues/154
x_refsource_MISC
https://github.com/halfgaar/FlashMQ/commit/e86c49360ef438...
x_refsource_MISC

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
.