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.
References (3)
Core 3
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/THM-Health/PILOS/security/advisories/GHSA-j4wr-p8gh-xrw5
X_Refsource_Misc x_refsource_misc
https://github.com/THM-Health/PILOS/commit/b50f2bd07c4f4a7d6a9981578238ae3579275d81
X_Refsource_Misc x_refsource_misc
https://github.com/THM-Health/PILOS/releases/tag/v4.14.1
Scores
CVSS v3
4.1
EPSS
0.0017
EPSS Percentile
6.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-1022
Status
published
Products (1)
THM-Health/PILOS
>= 2.1.0, < 4.14.1
Published
Aug 06, 2026
Tracked Since
Aug 07, 2026