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Vulnerability Intelligence

CVE-2025-62723

MEDIUM4.3

FlashMQ does not release memory of queued QoS messages

Published Oct 24, 2025

Modified 2 months ago

No fix available

Details

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.

References

WEBhttps://github.com/halfgaar/FlashMQ/commit/e86c49360ef4387440c97f591770cdb9284b4ee9 WEBhttps://github.com/halfgaar/FlashMQ/issues/154 WEBhttps://github.com/halfgaar/FlashMQ/security/advisories/GHSA-7mhp-22q4-r6vv ADVISORYhttps://www.cve.org/CVERecord?id=CVE-2025-62723

CVSS Analysis

CVSS v3.1

4.3

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

LowAC:L

Privileges Required

LowPR:L

User Interaction

NoneUI:N

Scope

Scope

UnchangedS:U

Impact

Confidentiality

NoneC:N

Integrity

NoneI:N

Availability

LowA:L

4.3/CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Weakness Type (CWE)

Other

Ecosystems

Timeline

PublishedOct 24, 2025

ModifiedOct 24, 2025

CVE-2025-62723 | Mondoo Vulnerability Intelligence