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CVE-2023-2808

nvd nist
Published: May 29, 2023Modified: Jun 17, 2026

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5.3
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Exploitability: 3.9 / Impact: 1.4
Source: NVD

Description

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.

Affected (3)

Mattermost
1 product
Mattermost
Configuration A
3 vulnerable
Vulnerable SoftwareAffected Versions
Mattermost
Mattermost
From 5.34.0 to 7.1.9
Mattermost
From 7.2.0 to 7.8.4
Mattermost
From 7.9.0 to 7.9.3

Related CWEs

CWE-20
Improper Input Validation
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

References (2)

Source: responsibledisclosure@mattermost.com
Vendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory

Timeline

No history available yet.