CVE-2023-2808: Lack of URL normalization allows rendering previews for disallowed domains
4.3
CVSS
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.
Classification
CVE ID: CVE-2023-2808
CVSS Base Severity: MEDIUM
CVSS Base Score: 4.3
Affected Products
Vendor: Mattermost
Product: Mattermost
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.06% (probability of being exploited)
EPSS Percentile: 26.2% (scored less or equal to compared to others)
EPSS Date: 2025-02-03 (when was this score calculated)