CVE-2026-71555 PILOS: Reverse tabnabbing in room description

PILOS Platform for Interactive Live-Online Seminars is a frontend for BigBlueButton. From 2.1.0 until 4.14.1, PILOS does not send a Cross-Origin-Opener-Policy response header, so pages opened by PILOS via a link that opens a new browsing context e.g., target="blank" retain a window.opener referen...

Reverse Tabnabbing

hfs is vulnerable to reverse tabnabbing. The vulnerability is due to missing rel="noopener noreferrer" when opening web links with target="blank", which allows an attacker to manipulate the original HFS tab via the window.opener property...