UBUNTU-CVE-2021-34434

Advisory lineage Upstream: 1 Downstream: 1
Upstream
CVE-2021-34434
Downstream
USN-6492-1
Published: 30 Aug 2021, 20:15
Last modified:22 Apr 2026, 12:55

Vulnerability Summary

Overall Risk (default)
low
21/100
CVSS Score
5.3 MEDIUM
3.1 (osv_ubuntu)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

30 Aug 2021, 20:15
Published
Vulnerability first disclosed
22 Apr 2026, 12:55
Last Modified
Vulnerability information updated

Description

In Eclipse Mosquitto versions 2.0 to 2.0.11, when using the dynamic security plugin, if the ability for a client to make subscriptions on a topic is revoked when a durable client is offline, then existing subscriptions for that client are not revoked.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected Systems

  • ubuntu•mosquitto

    < 2.0.11-1ubuntu1.1

References (4)