CVE-2025-14822

3.1 LOW

Published: January 16, 2026 Modified: January 20, 2026

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

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

CVSS v3.x Details

0.0 Low Medium High Critical 10.0

Vector String

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

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory

https://mattermost.com/security-updates

Source: responsibledisclosure@mattermost.com

Vendor Advisory

1 reference(s) from NVD

Quick Stats

CVSS v3 Score

3.1 / 10.0

EPSS (Exploit Probability)

0.0%

4th percentile

Exploitation Status

Not in CISA KEV

Weaknesses (CWE)

CWE-407 CWE-770

Affected Vendors

mattermost

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