CVE-2023-1777

Information disclosure in linked message previews

Description

Mattermost allows an attacker to request a preview of an existing message when creating a new message via the createPost API call, disclosing the contents of the linked message.

Remediation

Solution:

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

Categories

6.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.18%
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-2023-1777?
CVE-2023-1777 has been scored as a medium severity vulnerability.
How to fix CVE-2023-1777?
To fix CVE-2023-1777: Update Mattermost to version v7.8.0, v7.1.6, v7.7.2, or higher.
Is CVE-2023-1777 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-1777 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-2023-1777?
CVE-2023-1777 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.