SB2020061930 - Multiple vulnerabilities in Mattermost, Mattermost Server

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Main Vulnerability Database SB2020061930

SB2020061930 - Multiple vulnerabilities in Mattermost, Mattermost Server

Published: June 19, 2020 Updated: July 17, 2020

Security Bulletin ID SB2020061930
Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 50% Low 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Incorrect permission assignment for critical resource (CVE-ID: CVE-2016-11062)

The vulnerability allows a remote non-authenticated attacker to manipulate data.

An issue was discovered in Mattermost Server before 3.5.1. E-mail address verification can be bypassed.


2) Cross-site scripting (CVE-ID: CVE-2016-11063)

The vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data when processing data passed via file preview. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.


Remediation

Install update from vendor's website.

References