CVE-2018-12291
HIGH7.5EPSS 0.30%Matrix Synapse Security Filtering Flaw
Published: 5/13/2022Modified: 5/20/2026
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.
Affected packages (2)
- Debian/matrix-synapsefrom 0, < 0.31.1+dfsg-1
- PyPI/matrix-synapsefrom 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 |
References (6)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2018-12291
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2018-12291
- PATCHhttps://github.com/matrix-org/synapse
- WEBhttps://github.com/matrix-org/synapse/commit/0834b49c6a9b6c597a154d4b2dfcf8fff90699ec
- WEBhttps://github.com/matrix-org/synapse/pull/3371
- WEBhttps://github.com/matrix-org/synapse/releases/tag/v0.31.1