CVE-2018-12291
Matrix Synapse Security Filtering Flaw
7.5
HIGH
CVSS 3.1
EPSS 0.30%
Description
The on_get_missing_events function in handlers/federation.py in Matrix Synapse before 0.31.1 has a security bug in the get_missing_events federation API where event visibility rules were not applied correctly.
How to fix CVE-2018-12291
To remediate CVE-2018-12291, upgrade the affected package to a fixed version below.
- Debian/matrix-synapse—upgrade to 0.31.1+dfsg-1 or later
- —upgrade to 0.31.1 or later
Is CVE-2018-12291 being exploited?
Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 0.31.1+dfsg-1
- from 0, < 0.31.1
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:H/I:N/A:N |