What is CVE-2023-2808?

CVE-2023-2808 is a medium-severity vulnerability in Mattermost, classified under Improper Input Validation. CVSS score: 4.3/10. Published 2023-05-29.

How severe is CVE-2023-2808?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Improper input validation in Mattermost

CVE-2023-2808

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.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.004 (33.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

Affected products

Mattermost — versions 0, 7.1.9, 7.8.4

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

responsibledisclosure@mattermost.com (Vendor Advisory)

Frequently asked questions

What is CVE-2023-2808?: CVE-2023-2808 is a medium-severity vulnerability in Mattermost, classified under Improper Input Validation. CVSS score: 4.3/10. Published 2023-05-29.
How severe is CVE-2023-2808?: Medium severity. CVSS v3 base score is 4.3 out of 10.