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CVE-2017-7650

In Mosquitto before 1.4.12, pattern based ACLs can be bypassed by clients that set their username...

6.5 MediumFix available

In Mosquitto before 1.4.12, pattern based ACLs can be bypassed by clients that set their username/client id to '#' or '+'. This allows locally or remotely connected clients to access MQTT topics that they do have the rights to. The same issue may be present in third party authentication/access control plugins for Mosquitto.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
None
Availability
None

Exploit likelihood

2.47%Up 1.4 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 6.5

In Mosquitto before 1.4.12, pattern based ACLs can be bypassed by clients that set their username/client id to '#' or '+'. This allows locally or remotely connected clients to access MQTT topics that they do have the rights to. The same issue may be present in third party authentication/access control plugins for Mosquitto.

Record
CVE-2017-7650
CVSS 3.0
6.5 MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS 2.0
4.0 MediumAV:N/AC:L/Au:S/C:P/I:N/A:N
Weakness
CWE-287
Updated
2026-11-02
CVE List No score

In Mosquitto before 1.4.12, pattern based ACLs can be bypassed by clients that set their username/client id to '#' or '+'. This allows locally or remotely connected clients to access MQTT topics that they do have the rights to. The same issue may be present in third party authentication/access control plugins for Mosquitto.

Record
CVE-2017-7650
Updated
2026-11-02
EUVDEUVD-2017-16655 No score

In Mosquitto before 1.4.12, pattern based ACLs can be bypassed by clients that set their username/client id to '#' or '+'. This allows locally or remotely connected clients to access MQTT topics that they do have the rights to. The same issue may be present in third party authentication/access control plugins for Mosquitto.

Record
EUVD-2017-16655
Updated
2026-11-03
GitHub AdvisoriesGHSA-vcg2-pq78-9mhr 6.5

In Mosquitto before 1.4.12, pattern based ACLs can be bypassed by clients that set their username...

In Mosquitto before 1.4.12, pattern based ACLs can be bypassed by clients that set their username/client id to '#' or '+'. This allows locally or remotely connected clients to access MQTT topics that they do have the rights to. The same issue may be present in third party authentication/access control plugins for Mosquitto.

Record
GHSA-vcg2-pq78-9mhr
CVSS 3.0
6.5 MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-287
Updated
2026-11-02
OSVALPINE-CVE-2017-7650 6.5

In Mosquitto before 1.4.12, pattern based ACLs can be bypassed by clients that set their username/client id to '#' or '+'. This allows locally or remotely connected clients to access MQTT topics that they do have the rights to. The same issue may be present in third party authentication/access control plugins for Mosquitto.

Record
ALPINE-CVE-2017-7650
CVSS 3.0
6.5 MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
OSVBELL-CVE-2017-7650 6.5

CVE-2017-7650 does not affect BellSoft software

Record
BELL-CVE-2017-7650
CVSS 3.0
6.5 MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
Show 4 moreShow less
OSV 6.5

In Mosquitto before 1.4.12, pattern based ACLs can be bypassed by clients that set their username/client id to '#' or '+'. This allows locally or remotely connected clients to access MQTT topics that they do have the rights to. The same issue may be present in third party authentication/access control plugins for Mosquitto.

Record
CVE-2017-7650
CVSS 3.0
6.5 MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
OSVDEBIAN-CVE-2017-7650 6.5

In Mosquitto before 1.4.12, pattern based ACLs can be bypassed by clients that set their username/client id to '#' or '+'. This allows locally or remotely connected clients to access MQTT topics that they do have the rights to. The same issue may be present in third party authentication/access control plugins for Mosquitto.

Record
DEBIAN-CVE-2017-7650
CVSS 3.0
6.5 MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
OSVUBUNTU-CVE-2017-7650 6.5

In Mosquitto before 1.4.12, pattern based ACLs can be bypassed by clients that set their username/client id to '#' or '+'. This allows locally or remotely connected clients to access MQTT topics that they do have the rights to. The same issue may be present in third party authentication/access control plugins for Mosquitto.

Record
UBUNTU-CVE-2017-7650
CVSS 3.0
6.5 MediumCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
OSVopenSUSE-SU-2024:11057-1 No score

libmosquitto1-2.0.11-1.2 on GA media

These are all security issues fixed in the libmosquitto1-2.0.11-1.2 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:11057-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
mosquitto
Alpine:v3.10
 before 1.4.12-r0
1.4.12-r0
mosquitto
Alpine:v3.11
 before 1.4.12-r0
1.4.12-r0
mosquitto
Alpine:v3.12
 before 1.4.12-r0
1.4.12-r0
mosquitto
Alpine:v3.13
 before 1.4.12-r0
1.4.12-r0
mosquitto
Alpine:v3.14
 before 1.4.12-r0
1.4.12-r0
mosquitto
Alpine:v3.15
 before 1.4.12-r0
1.4.12-r0
mosquitto
Alpine:v3.16
 before 1.4.12-r0
1.4.12-r0
mosquitto
Alpine:v3.17
 before 1.4.12-r0
1.4.12-r0
mosquitto
Alpine:v3.18
 before 1.4.12-r0
1.4.12-r0
mosquitto
Alpine:v3.19
 before 1.4.12-r0
1.4.12-r0
Show 19 moreShow less
Affected packages
PackageAffectedFixed
mosquitto
Alpine:v3.20
 before 1.4.12-r0
1.4.12-r0
mosquitto
Alpine:v3.21
 before 1.4.12-r0
1.4.12-r0
mosquitto
Alpine:v3.22
 before 1.4.12-r0
1.4.12-r0
mosquitto
Alpine:v3.23
 before 1.4.12-r0
1.4.12-r0
mosquitto
Alpine:v3.24
 before 1.4.12-r0
1.4.12-r0
mosquitto
Alpine:v3.3
 before 1.4.12-r0
1.4.12-r0
mosquitto
Alpine:v3.4
 before 1.4.12-r0
1.4.12-r0
mosquitto
Alpine:v3.5
 before 1.4.12-r0
1.4.12-r0
mosquitto
Alpine:v3.6
 before 1.4.12-r0
1.4.12-r0
mosquitto
Alpine:v3.7
 before 1.4.12-r0
1.4.12-r0
mosquitto
Alpine:v3.8
 before 1.4.12-r0
1.4.12-r0
mosquitto
Alpine:v3.9
 before 1.4.12-r0
1.4.12-r0
mosquitto
Debian:12
 before 1.4.10-3
1.4.10-3
mosquitto
Debian:13
 before 1.4.10-3
1.4.10-3
mosquitto
Debian:14
 before 1.4.10-3
1.4.10-3
mosquitto
Debian:7
 before 0.15-2+deb7u1, plus listed versions
0.15-2
0.15-2+deb7u1
mosquitto
Debian:8
 before 1.3.4-2+deb8u1, plus listed versions
1.3.4-2
1.3.4-2+deb8u1
mosquitto
Ubuntu:14.04:LTS
 before 0.15-2ubuntu1.1, plus listed versions
0.15-2ubuntu1
0.15-2ubuntu1.1
mosquitto
Ubuntu:16.04:LTS
 before 1.4.8-1ubuntu0.16.04.1, plus listed versions
1.4.3-11.4.4-11.4.7-11.4.8-11.4.8-1build1
1.4.8-1ubuntu0.16.04.1

History

History
RecordedChangedSources
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2017-7650 is a medium vulnerability (CVSS 6.5) in Eclipse Mosquitto, published May 29, 2017. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.47%, the 84th percentile. Fixed in mosquitto 1.4.12-r0.

References

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