CVE-2026-25222
Severity CVSS v4.0:
MEDIUM
Type:
CWE-200
Information Leak / Disclosure
Publication date:
02/02/2026
Last modified:
02/02/2026
Description
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).
Impact
Base Score 4.0
6.30
Severity 4.0
MEDIUM