CVE-2026-25885
Unauthenticated WebSocket allows joining and posting to any PolarLearn group.
Is CVE-2026-25885 being exploited?
Not confirmed. CVE-2026-25885 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.30% probability of exploitation in the next 30 days.
How severe is CVE-2026-25885?
CVE-2026-25885 is rated Critical with a CVSS score of 10.0. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-25885?
Yes. A fix has been recorded for CVE-2026-25885. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-25885 affect?
CVE-2026-25885 affects PolarLearn WebSocket API (wss://polarlearn.nl/api/v1/ws). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-25885?
Upgrade to patched release; enforce WebSocket authentication and input validation.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated users can subscribe to and post in any group; potential for spam, data leakage, and abuse.
Immediate action required
- affected< 0-PRERELEASE-16
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.