Is this vulnerability remotely exploitable?

Yes. Any remote client that can reach the WebSocket endpoint over the network can subscribe to and post in group chats, even without a PolarLearn account.

Does exploitation require a valid user account or login session?

No. The described behavior allows completely unauthenticated clients to connect and interact with group chats, as long as they supply a group UUID.

What is the safest general fix pattern for this type of issue?

The safest pattern is to enforce strong authentication on all WebSocket connections and perform server-side authorization checks on every action, ensuring that only users with verified group membership can subscribe to or send messages in that group.

Severity:

HIGH RISK

(7.5)

Missing Authentication & Authorization (CWE-306/CWE-285) in PolarLearn Group Chat WebSocket

CVE-2026-25885

Published:

Feb 9, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

Remote Code Execution on the Router

April 6, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Remote Code Execution on Router Firmware

April 6, 2026

Vulnerability Type

Category:

Authentication and Authorization Failures

CWE:

CWE-285;CWE-306

Impact:

Unauthorized Access and Data Integrity Compromise

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

Vulnerability Type

Category:

Authentication and Authorization Failures

CWE:

CWE-285;CWE-306

Impact:

Unauthorized Access and Data Integrity Compromise

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

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Missing Authentication & Authorization (CWE-306/CWE-285) in PolarLearn Group Chat WebSocket

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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