CVE-2018-12423
Matrix Synapse Authorization Error
7.5
HIGH
CVSS 3.1
EPSS 0.27%
Description
In Synapse before 0.31.2, unauthorised users can hijack rooms when there is no m.room.power_levels event in force.
How to fix CVE-2018-12423
To remediate CVE-2018-12423, upgrade the affected package to a fixed version below.
- Debian/matrix-synapse—upgrade to 0.31.2+dfsg-1 or later
- PyPI/matrix-synapse—upgrade to 0.31.2 or later
Is CVE-2018-12423 being exploited?
Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 0.31.2+dfsg-1
- from 0, < 0.31.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |