CVE-2025-62723

low-risk
Published 2025-10-24

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.

Do I need to act?

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0.06% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
4
CVSS 4.3/10 Medium
NETWORK / LOW complexity

Affected Products (1)

Flashmq

Affected Vendors

Flashmq

References (3)

Patch https://github.com/halfgaar/FlashMQ/commit/e86c49360ef4387440c97f591770cdb9284b4...
Issue Tracking https://github.com/halfgaar/FlashMQ/issues/154
Patch https://github.com/halfgaar/FlashMQ/security/advisories/GHSA-7mhp-22q4-r6vv
23
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal