Question: What is CVE-2025-21088?
Answer: CVE-2025-21088 is a vulnerability classified as medium with a CVSS score of 6.5. It falls under CWE-704 and affects the system as follows: 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.