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CVE-2026-25221

8.1 · HIGH

PolarLearn is a free and open-source learning program.

Published Feb 2, 2026CWE-352EPSS 0.24%

Overview

CVE-2026-25221 is a high-severity vulnerability. It was published on February 2, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

PolarLearn is a free and open-source learning program. In 0-PRERELEASE-15 and earlier, the OAuth 2.0 implementation for GitHub and Google login providers is vulnerable to Login Cross-Site Request Forgery (CSRF). The application fails to implement and verify the state parameter during the authentication flow. This allows an attacker to pre-authenticate a session and trick a victim into logging into the attacker's account. Any data the victim then enters or academic progress they make is stored on the attacker's account, leading to data loss for the victim and information disclosure to the attacker.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/polarnl/PolarLearn/commit/44669bbb5b647c7625f22dd82f3121c7d7bfbe19GitHubgithub.com/polarnl/PolarLearn/security/advisories/GHSA-fhhm-574m-7rpw

How CyberStrike helps

Frequently asked questions

What is CVE-2026-25221?

CVE-2026-25221 is a high-severity vulnerability. It was published on February 2, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

How severe is CVE-2026-25221?

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-25221?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-25221?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-25221 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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