CVE-2017-18920 describes a critical vulnerability in Mattermost Server versions prior to 3.6.2, where the WebSocket feature fails to enforce the Same Origin Policy. This flaw carries a CVSS v3.1 score of 9.8 (Critical), indicating that it is network-exploitable with low attack complexity, requiring no user interaction, and can lead to complete compromise of confidentiality, integrity, and availability. Despite its severity, there is currently no evidence of active exploitation, publicly available exploit code in Metasploit or ExploitDB, nor significant community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 3.6.2CPE matchmatch criteria | cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.