CVE-2018-12291 describes a security vulnerability in Matrix Synapse versions prior to 0.31.1, specifically within the on_get_missing_events function in handlers/federation.py. This flaw allows for the incorrect application of event visibility rules during the get_missing_events federation API call. With a CVSS score of 7.5 (HIGH), it represents a critical unauthenticated remote attack (AV:N/AC:L/PR:N/UI:N) that could lead to high confidentiality impact (C:H) by exposing sensitive event data. Despite its severity, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage surrounding this vulnerability.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 0.31.1CPE matchmatch criteria | cpe:2.3:a:matrix:synapse:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.