PT-2020-10851 · Mattermost · Mattermost Server

Published 2020-06-19 · Updated 2021-07-21 · CVE-2019-20887

Positive Technologies (AI Summary)

CVSS v3.1

4.3

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Name of the Vulnerable Software and Affected Versions Mattermost Server versions prior to 5.7.1 Mattermost Server versions prior to 5.6.4 Mattermost Server versions prior to 5.5.3 Mattermost Server versions prior to 4.10.6

Description The issue concerns the Mattermost Server not honoring flags API permissions, which affects the decision on whether a user can receive intra-team posts.

Recommendations For versions prior to 5.7.1, update to version 5.7.1 or later. For versions prior to 5.6.4, update to version 5.6.4 or later. For versions prior to 5.5.3, update to version 5.5.3 or later. For versions prior to 4.10.6, update to version 4.10.6 or later.

Fix

Missing Authorization

Weakness Enumeration

CWE-862

Related Identifiers

CVE-2019-20887

Affected Products

Mattermost Server

References · 3

• https://mattermost.com/security-updates · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2019-20887 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-20887 · Security Note