CVEvulnerability

CVE-2026-71555

4.1 MEDIUM Published 2026-08-06 Modified 2026-10-24 Official page ↗
Status
Deferred
Published
2026-08-06
Last modified
2026-10-24
Assigner
[email protected]
CVSS 3.1 ([email protected])
4.1 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N
Weaknesses
CWE-1022

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 reference back to the originating PILOS tab. A malicious destination page reached this way can use window.opener to navigate or manipulate the original PILOS tab, a technique known as reverse tabnabbing, potentially redirecting an authenticated user to a phishing page that mimics PILOS. This issue is fixed in version 4.14.1.

Related

Weakness · CWE (1)

  • CWE-1022 Use of Web Link to Untrusted Target with window.opener Access weakness

References