CVE-2018-12543
In Eclipse Mosquitto versions 1.5 to 1.5.2 inclusive, if a message is published to Mosquitto that...
In Eclipse Mosquitto versions 1.5 to 1.5.2 inclusive, if a message is published to Mosquitto that has a topic starting with $, but that is not $SYS, e.g. $test/test, then an assert is triggered that should otherwise not be reachable and Mosquitto will exit.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
In Eclipse Mosquitto versions 1.5 to 1.5.2 inclusive, if a message is published to Mosquitto that has a topic starting with $, but that is not $SYS, e.g. $test/test, then an assert is triggered that should otherwise not be reachable and Mosquitto will exit.
- Record
CVE-2018-12543- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Weakness
- CWE-617, CWE-20
- Updated
- 2026-11-02
CVE List No score
In Eclipse Mosquitto versions 1.5 to 1.5.2 inclusive, if a message is published to Mosquitto that has a topic starting with $, but that is not $SYS, e.g. $test/test, then an assert is triggered that should otherwise not be reachable and Mosquitto will exit.
- Record
CVE-2018-12543- Weakness
- CWE-617
- Updated
- 2026-11-02
EUVDEUVD-2018-4505 No score
In Eclipse Mosquitto versions 1.5 to 1.5.2 inclusive, if a message is published to Mosquitto that has a topic starting with $, but that is not $SYS, e.g. $test/test, then an assert is triggered that should otherwise not be reachable and Mosquitto will exit.
- Record
EUVD-2018-4505- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-4g6q-vx9q-q84r
In Eclipse Mosquitto versions 1.5 to 1.5.2 inclusive, if a message is published to Mosquitto that...
In Eclipse Mosquitto versions 1.5 to 1.5.2 inclusive, if a message is published to Mosquitto that has a topic starting with $, but that is not $SYS, e.g. $test/test, then an assert is triggered that should otherwise not be reachable and Mosquitto will exit.
- Record
GHSA-4g6q-vx9q-q84r- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-20
- Updated
- 2026-11-02
OSVALPINE-CVE-2018-12543
In Eclipse Mosquitto versions 1.5 to 1.5.2 inclusive, if a message is published to Mosquitto that has a topic starting with $, but that is not $SYS, e.g. $test/test, then an assert is triggered that should otherwise not be reachable and Mosquitto will exit.
- Record
ALPINE-CVE-2018-12543- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVBELL-CVE-2018-12543
CVE-2018-12543 does not affect BellSoft software
- Record
BELL-CVE-2018-12543- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSV
In Eclipse Mosquitto versions 1.5 to 1.5.2 inclusive, if a message is published to Mosquitto that has a topic starting with $, but that is not $SYS, e.g. $test/test, then an assert is triggered that should otherwise not be reachable and Mosquitto will exit.
- Record
CVE-2018-12543- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - 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
| Package | Affected | Fixed |
|---|---|---|
mosquittoAlpine:v3.10 |
1.5.0 up to 1.5.3-r0 | 1.5.3-r0 |
mosquittoAlpine:v3.11 |
1.5.0 up to 1.5.3-r0 | 1.5.3-r0 |
mosquittoAlpine:v3.12 |
1.5.0 up to 1.5.3-r0 | 1.5.3-r0 |
mosquittoAlpine:v3.13 |
1.5.0 up to 1.5.3-r0 | 1.5.3-r0 |
mosquittoAlpine:v3.14 |
1.5.0 up to 1.5.3-r0 | 1.5.3-r0 |
mosquittoAlpine:v3.15 |
1.5.0 up to 1.5.3-r0 | 1.5.3-r0 |
mosquittoAlpine:v3.16 |
1.5.0 up to 1.5.3-r0 | 1.5.3-r0 |
mosquittoAlpine:v3.17 |
1.5.0 up to 1.5.3-r0 | 1.5.3-r0 |
mosquittoAlpine:v3.18 |
1.5.0 up to 1.5.3-r0 | 1.5.3-r0 |
mosquittoAlpine:v3.19 |
1.5.0 up to 1.5.3-r0 | 1.5.3-r0 |
Show 6 moreShow less
| Package | Affected | Fixed |
|---|---|---|
mosquittoAlpine:v3.20 |
1.5.0 up to 1.5.3-r0 | 1.5.3-r0 |
mosquittoAlpine:v3.21 |
1.5.0 up to 1.5.3-r0 | 1.5.3-r0 |
mosquittoAlpine:v3.22 |
1.5.0 up to 1.5.3-r0 | 1.5.3-r0 |
mosquittoAlpine:v3.23 |
1.5.0 up to 1.5.3-r0 | 1.5.3-r0 |
mosquittoAlpine:v3.24 |
1.5.0 up to 1.5.3-r0 | 1.5.3-r0 |
mosquittoAlpine:v3.9 |
1.5.0 up to 1.5.3-r0 | 1.5.3-r0 |
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2018-12543 is a high vulnerability (CVSS 7.5) in Eclipse Mosquitto, published November 15, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 36.0%, the 98th percentile. Fixed in mosquitto 1.5.3-r0.
References
bugs.eclipse.org/bugs/show_bug.cgi?id=539295
nvd.nist.gov/vuln/detail/CVE-2018-12543
github.com/advisories/GHSA-4g6q-vx9q-q84r
security.alpinelinux.org/vuln/CVE-2018-12543
docs.bell-sw.com/security/cves/CVE-2018-12543
suse.com/security/cve/CVE-2017-7650
Show 11 moreShow less