Input validation error in Mattermost, Mattermost Server



| Updated: 2020-08-08
Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2017-18920
CWE-ID CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Mattermost Server
Client/Desktop applications / Messaging software

Vendor Mattermost, Inc.

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Input validation error

EUVDB-ID: #VU34209

Risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2017-18920

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Mattermost Server:

CPE2.3 External links

https://mattermost.com/security-updates/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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