PT-2020-8426 · Mattermost · Mattermost Server

Published 2020-06-19 · Updated 2020-06-26 · CVE-2017-18880

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions: Mattermost Server versions prior to 4.3.0 Mattermost Server version 4.2.1 Mattermost Server version 4.1.2

Description: An issue was discovered in Mattermost Server. XSS could occur via the title link field of a Slack attachment.

Recommendations: For versions prior to 4.3.0, update to version 4.3.0 or later. For version 4.2.1, update to version 4.3.0 or later. For version 4.1.2, update to version 4.3.0 or later. As a temporary workaround, consider restricting the use of the title link field in Slack attachments until a patch is available.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2017-18880

Affected Products

Mattermost Server

References · 5

• https://osv.dev/vulnerability/CVE-2017-18880 · Vendor Advisory
• https://mattermost.com/security-updates · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2017-18880 · Security Note
• https://t.me/cibsecurity/12927 · Telegram Post
• https://t.me/cvenotify/4515 · Telegram Post