PolarLearn is a free and open-source learning program. In 0-PRERELEASE-16 and earlier, the group chat WebSocket at wss://polarlearn.nl/api/v1/ws can be used without logging in. An unauthenticated client can subscribe to any group chat by providing a group UUID, and can also send messages to any group. The server accepts the message and stores it in the group’s chatContent, so this is not just a visual spam issue.
Advisories

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Fixes

Solution

No solution given by the vendor.


Workaround

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History

Tue, 10 Feb 2026 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 10 Feb 2026 12:45:00 +0000

Type Values Removed Values Added
First Time appeared Polarnl
Polarnl polarlearn
Vendors & Products Polarnl
Polarnl polarlearn

Mon, 09 Feb 2026 21:30:00 +0000

Type Values Removed Values Added
Description PolarLearn is a free and open-source learning program. In 0-PRERELEASE-16 and earlier, the group chat WebSocket at wss://polarlearn.nl/api/v1/ws can be used without logging in. An unauthenticated client can subscribe to any group chat by providing a group UUID, and can also send messages to any group. The server accepts the message and stores it in the group’s chatContent, so this is not just a visual spam issue.
Title PolarLearn allows Unauthenticated WebSocket access allows subscribing to and posting in arbitrary group chats
Weaknesses CWE-285
CWE-306
References
Metrics cvssV4_0

{'score': 10, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-02-10T15:58:03.240Z

Reserved: 2026-02-06T21:08:39.129Z

Link: CVE-2026-25885

cve-icon Vulnrichment

Updated: 2026-02-10T15:39:33.292Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-02-09T22:16:03.583

Modified: 2026-02-10T15:22:54.740

Link: CVE-2026-25885

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-02-10T11:35:04Z

Weaknesses