PT-2023-21539 · Unknown · Mattermost

Published 2023-05-29 · Updated 2023-06-05 · CVE-2023-2808

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Mattermost (affected versions not specified)

Description The issue arises from Mattermost's failure to normalize UTF confusable characters when determining whether to generate a preview for a hyperlink. This allows an attacker to trigger a link preview on a disallowed domain by using a specially crafted link.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

RCE

Weakness Enumeration

CWE-20

Related Identifiers

CVE-2023-2808

Affected Products

Mattermost

References · 6

• https://mattermost.com/security-updates · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-2808 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-2808 · Security Note
• https://t.me/cvenotify/51334 · Telegram Post
• https://t.me/cvenotify/51754 · Telegram Post
• https://t.me/cibsecurity/64759 · Telegram Post