Back to Database
Status published
Medium
CVE-2023-2831
Denial of Service while unescaping a Markdown string
Vulnerability Description
Mattermost fails to unescape Markdown strings in a memory-efficient way, allowing an attacker to cause a Denial of Service by sending a message containing a large number of escaped characters.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
THREAT MONITOR
Am I Vulnerable?
Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2023-2831
Credits & Attribution
The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:
- claverrat
References
More from Mattermost
View All →CVE-2025-9084
Open redirect in OAuth login
Low
3.1
CVE-2025-9081
IDOR in board file download allows any user to download any file by UUID
Low
3.1
CVE-2025-9079
Admin RCE via prepackaged plugins by way of misconfigured imports directory
High
8
CVE-2025-9078
Weak cache keys lead to post IDOR and link preview poisoning
Medium
4.3
CVE-2025-9076
Mattermost Server exposes sensitive user credentials during shared channel membership synchronization
Medium
6.5
Affected Vendor
Mattermost
View all reports →Affected Software
Mattermost
Vulnerable Versions:
0, 7.10.0, 7.1.10 , 7.8.5, 7.9.4, 7.10.1
Timeline
Official Publish:
June 16th, 2023
Last Modified:
December 6th, 2024
Added to House:
July 22nd, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L