CVE-2023-2808

MEDIUM

Mattermost 5.34.0-7.1.9 - Link Preview Spoofing via UTF Confusable Characters

Title source: llm
STIX 2.1

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.

References (1)

Core 1
Core References

Scores

CVSS v3 4.3
EPSS 0.0023
EPSS Percentile 45.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-20
Status published
Products (1)
mattermost/mattermost 5.34.0 - 7.1.9
Published May 29, 2023
Tracked Since Feb 18, 2026