SB2020061950 - Input validation error in Mattermost, Mattermost Server
Published: June 19, 2020 Updated: August 8, 2020
Security Bulletin ID
SB2020061950
Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Input validation error (CVE-ID: CVE-2017-18920)
The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.
An issue was discovered in Mattermost Server before 3.6.2. The WebSocket feature does not follow the Same Origin Policy.
Remediation
Install update from vendor's website.