CVEvulnerability

CVE-2023-2808

5.3 MEDIUM Published 2023-05-29 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2023-05-29
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
4.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
CVSS 3.1 ([email protected])
5.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weaknesses
CWE-20

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 configurations

• mattermost mattermost (>= 5.34.0 < 7.1.9) • mattermost mattermost (>= 7.2.0 < 7.8.4) • mattermost mattermost (>= 7.9.0 < 7.9.3)

Related

Weakness · CWE (1)

  • CWE-20 Improper Input Validation weakness

References