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I. Basic Information for CVE-2026-25221
Vulnerability Information

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Vulnerability Title
PolarLearn has Multiple Login CSRFs via Missing OAuth state Parameter (GitHub & Google)
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
跨站请求伪造(CSRF)
Source: NVD (National Vulnerability Database)
Vulnerability Title
PolarLearn 跨站请求伪造漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
PolarLearn是PolarNL开源的一个在线学习平台。 PolarLearn 0-PRERELEASE-15及之前版本存在跨站请求伪造漏洞,该漏洞源于OAuth 2.0实现中未验证state参数,可能导致登录跨站请求伪造攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
VendorProductAffected VersionsCPESubscribe
polarnlPolarLearn <= v0-PRERELEASE-15 -
II. Public POCs for CVE-2026-25221
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III. Intelligence Information for CVE-2026-25221
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