CVE-2025-14822

MEDIUM EPSS 23.5%

Published Jan 16, 20265mo ago · Modified Jun 17, 20261w ago

6.5 CVSS 3.1

Medium

Published Jan 16, 2026 5mo ago

Last Modified Jun 17, 2026 1w ago

Description

Mattermost versions 10.11.x <= 10.11.8 fail to validate input size before processing hashtags which allows an authenticated attacker to exhaust CPU resources via a single HTTP request containing a post with thousands space-separated tokens

CVSS Details

Base Score

6.5

Exploitability

2.8

Impact

3.6

Vector string

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector Network

Attack Complexity Low

Privileges Required Low

User Interaction None

Scope Unchanged

Confidentiality None

Integrity None

Availability High

Threat Intelligence

EPSS Exploit Probability

23.5% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 2

CWE-407

CWE-770

Affected Products 1

Vendor	Product	Version	Range
mattermost	mattermost_server	*	≥10.11.0 – <10.11.9

References 1

mattermost.com https://mattermost.com/security-updates

Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.