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Fencer Vulns
medium 6.5

CVE-2018-12546 json

In Eclipse Mosquitto version 1.0 to 1.5.5 (inclusive) when a client publishes a retained message to a topic, then has its access to that to…

published 2019-03-27 7 y ago modified 2026-06-17 4 mo ago also EUVD-2018-4506

cvss
6.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 56%
public exploits
0
none known

Summary

In Eclipse Mosquitto version 1.0 to 1.5.5 (inclusive) when a client publishes a retained message to a topic, then has its access to that topic revoked, the retained message will still be published to clients that subscribe to that topic in the future. In some applications this may result in clients being able cause effects that would otherwise not be allowed.

Patch / fix

  • mosquitto Debian 14, Debian 13, Debian 12 1.5.6-1

debian advisories DEBIAN-CVE-2018-12546

  • mosquitto Ubuntu 16.04 LTS 1.4.8-1ubuntu0.16.04.5
  • mosquitto Ubuntu 18.04 LTS 1.4.15-2ubuntu0.18.04.1

ubuntu advisories UBUNTU-CVE-2018-12546

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • mosquitto Package Hub 15 1.4.15-bp150.3.3.1

opensuse advisories openSUSE-SU-2019:0237-1

  • mosquitto Alpine 3.24, Alpine 3.23, Alpine 3.22 +13 more 1.5.6-r0
  • mosquitto Alpine 3.7 1.4.15-r1
  • mosquitto Alpine 3.8 1.4.15-r5

alpine advisories ALPINE-CVE-2018-12546

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-12546 updated cvss 6.5

mosquitto: message privilege escalation

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.80% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • bugs.eclipse.org https://bugs.eclipse.org/bugs/show_bug.cgi?id=543127 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
NVD 2.0 4.0 AV:N/AC:L/Au:S/C:N/I:P/A:N

Affected products

  • The Eclipse Foundation Eclipse Mosquitto

Classification

Weakness
  • CWE-284 Improper Access Control
  • CWE-732 Incorrect Permission Assignment for Critical Resource

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.