CVE-2025-21088 MEDIUM

CVE-2025-21088: WebApp crash via improper validation of proto style in attachments

Vendor Mattermost
Product Mattermost
Weakness CWE-704
Published January 15, 2025
Last update January 15, 2025
View on NVD All CVEs

CVSS base score

6.5/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality None
Integrity None

CVSS vector

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

What the vulnerability does

01Description

Mattermost versions 10.2.x <= 10.2.0, 9.11.x <= 9.11.5, 10.0.x <= 10.0.3, 10.1.x <= 10.1.3 fail to properly validate the style of proto supplied to an action's style in post.props.attachments, which allows an attacker to crash the frontend via crafted malicious input.

Key dates

02Disclosure timeline

January 15, 2025 CVE published
January 15, 2025 Record updated