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TI-2026-50127 Aliases CVE-2026-71555

PILOS: Reverse tabnabbing in room description

Priority LOW 19CWE-1022Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00293 21st percentileScored 2026-11-07
Fix Fixed PILOS (THM-Health): 4.14.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
THM-HealthPILOS2.1.0 to before 4.14.14.14.1Patch availableCNA
  • PILOS VendorTHM-Health Affected 2.1.0 to before 4.14.1 Fixed in 4.14.1 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:thm:pilos:*:*:*:*:*:*:*:*——THM-Health
  • cpe:2.3:a:thm:pilos:*:*:*:*:*:*:*:* Versions — — ·THM-Health

Remediation

  • Fix · CNA PILOS (THM-Health) Fixed in 4.14.1

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-71555

References

Other 3

  • TI-2023-25447 PILOS account takeover through password reset poisoning CVSS 3.1HIGH 8.8
  • TI-2025-38763 PILOS Misconfigured the Access-Control-Allow-Origin Header CVSS 3.1MEDIUM 6.3
  • TI-2023-19076 Storing unencrypted LDAP passwords in feedbacksystem CVSS 3.1MEDIUM 6.0
  • TI-2025-38764 PILOS Exposes PHP version CVSS 3.1MEDIUM 5.3
  • TI-2025-38964 PILOS is missing session regeneration after password change CVSS 3.1MEDIUM 5.0
  • TI-2023-12213 Insufficient verification of authorisation when accessing subresults in thmmniii/fbs-core CVSS 3.1MEDIUM 4.3
See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences