CVE-2026-4265 Guest user can upload files without permission across teams

Mattermost versions 11.3.x = 11.3.0, 11.2.x = 11.2.2, 10.11.x = 10.11.10 fail to validate team-specific uploadfile permissions which allows a guest user to post files in channels where they lack uploadfile permission via uploading files in a team where they have permission and reusing the file...

What is Continuous Threat Exposure Management? A Guide For CISOs and Vulnerability Teams

Traditional vulnerability management has taught us to look for weaknesses inside our own walls. But what if we flipped the script and started looking at our defenses from the outside in, just like an attacker does? Attackers don't care about CVSS scores; they care about pathways. They look for th...

Automated remediation level 1: Lock down fundamentals

Non-calamitous conclusions When teams work in silos, they often can have different interpretations of the same data. There’s no way to leverage the real benefits of automated remediation if this is your reality. Ensuring visibility across teams is a critical component in a shared data set where...