polarnl PolarLearn up to v0-PRERELEASE-15 cross-site request forgery

Summaryinfo

A vulnerability was found in polarnl PolarLearn up to v0-PRERELEASE-15. It has been classified as problematic. This affects an unknown part. This manipulation causes cross-site request forgery. This vulnerability appears as CVE-2026-25221. The attack may be initiated remotely. There is no available exploit. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability classified as problematic was found in polarnl PolarLearn up to v0-PRERELEASE-15. Affected by this vulnerability is an unknown code block. The manipulation with an unknown input leads to a cross-site request forgery vulnerability. The CWE definition for the vulnerability is CWE-352. The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request. As an impact it is known to affect integrity. The summary by CVE is:

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.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-25221 since 01/30/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available.

Applying the patch 44669bbb5b647c7625f22dd82f3121c7d7bfbe19 is able to eliminate this problem. The bugfix is ready for download at github.com.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• polarnl

Name

• PolarLearn

Version

• v0-PRERELEASE-15

License

• open-source

Website

• Product: https://github.com/polarnl/PolarLearn/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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