CVE-2026-25221 LOW

CVE-2026-25221: PolarLearn has Multiple Login CSRFs via Missing OAuth state Parameter (GitHub & Google)

Vendor Polarnl
Product PolarLearn
Weakness CWE-352 · CSRF
Published February 2, 2026
Last update February 3, 2026

CVSS base score

2.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

February 2, 2026 CVE published
February 3, 2026 Record updated