Github
CVE-2026-25221
HIGH
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Lifecycle Timeline
4DescriptionGitHub Advisory
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.
AnalysisAI
PolarLearn versions 0-PRERELEASE-15 and earlier lack proper state parameter validation in OAuth 2.0 authentication, enabling attackers to conduct login CSRF attacks against GitHub and Google login flows. An attacker can pre-authenticate a victim's session and trick them into logging into the attacker's account, causing the victim's data and academic progress to be stored on the attacker's account instead. Public exploit code exists for this vulnerability, and a patch is available.
Technical ContextAI
Classified as CWE-352 (Cross-Site Request Forgery (CSRF)). Affects Polarlearn. 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
RemediationAI
A vendor patch is available — apply it immediately. Restrict network access to the affected service where possible.
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External POC / Exploit Code
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