polarnl PolarLearn up to 0-PRERELEASE-15 Logendpoint information disclosure

Summaryinfo

A vulnerability, which was classified as problematic, was found in polarnl PolarLearn up to 0-PRERELEASE-15. The impacted element is an unknown function of the component Logendpoint. Such manipulation leads to information disclosure. This vulnerability is documented as CVE-2026-25222. The attack can be executed remotely. There is not any exploit available. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in polarnl PolarLearn up to 0-PRERELEASE-15. Affected by this issue is some unknown functionality of the component Logendpoint. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. CVE summarizes:

PolarLearn is a free and open-source learning program. In 0-PRERELEASE-15 and earlier, a timing attack vulnerability in the sign-in process allows unauthenticated attackers to determine if a specific email address is registered on the platform. By measuring the response time of the login endpoint, an attacker can distinguish between valid and invalid email addresses. This occurs because the server only performs the computationally expensive Argon2 password hashing if the user exists in the database. Requests for existing users take significantly longer (~650ms) than requests for non-existent users (~160ms).

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-25222 since 01/30/2026. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1592.

Applying the patch 6c276855172c7310cce0df996cb47ffe0d886741 is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-5344). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

• polarnl

Name

• PolarLearn

Version

• 0-PRERELEASE-15

License

• open-source

Website

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

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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