CVE-2023-1776

Stored XSS via SVG attachment on Boards

Description

Boards in Mattermost allows an attacker to upload a malicious SVG image file as an attachment to a card and share it using a direct link to the file.

Remediation

Solution:

  • Update Mattermost to version v7.8.0, v7.1.6, v7.7.2, or higher.

Category

7.3
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.47%
Vendor Advisory mattermost.com
Affected: Mattermost Mattermost
Published at:
Updated at:

References

Link Tags
https://mattermost.com/security-updates/ vendor advisory

Frequently Asked Questions

What is the severity of CVE-2023-1776?
CVE-2023-1776 has been scored as a high severity vulnerability.
How to fix CVE-2023-1776?
To fix CVE-2023-1776: Update Mattermost to version v7.8.0, v7.1.6, v7.7.2, or higher.
Is CVE-2023-1776 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-1776 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-1776?
CVE-2023-1776 affects Mattermost Mattermost.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.