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MEDIUM · 4.3

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 s...

Vulnerability 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.

CVSS Score

4.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE

Affected Products

VendorProductVersions
MattermostMattermost>= 5.34.0, < 7.1.9

Related Weaknesses (CWE)

CWE-20

References

FAQ

What is CVE-2023-2808?

CVE-2023-2808 is a vulnerability with a CVSS score of 4.3 (MEDIUM). 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 s...

How severe is CVE-2023-2808?

CVE-2023-2808 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2023-2808?

Check the references section above for vendor advisories and patch information. Affected products include: Mattermost Mattermost.