CVE-2023-2808 MEDIUM

CVE-2023-2808: Lack of URL normalization allows rendering previews for disallowed domains

Vendor Mattermost
Product Mattermost
Weakness CWE-20 · Input validation
Published May 29, 2023
Last update December 6, 2024
View on NVD All CVEs

CVSS base score

4.3/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality None
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

What the vulnerability does

01Description

Mattermost fails to normalize UTF confusable characters when determining if a preview should be generated for a hyperlink, allowing an attacker to trigger link preview on a disallowed domain using a specially crafted link.

Key dates

02Disclosure timeline

May 29, 2023 CVE published
December 6, 2024 Record updated