VULNERABILITY INTELLIGENCE

CVE-2023-2808

CVSS score4.3 MEDIUM
EPSS probability0.41%
CISA KEVNot currently listed
Published2023-05-29
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

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.

Weakness classification

  • responsibledisclosure@mattermost.com: CWE-20
  • nvd@nist.gov: NVD-CWE-noinfo

Primary references