What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-02-02 · updated 2026-06-17
• Weakness: CWE-352

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.

Affected products

• polarnl PolarLearn: all versions

References

• https://github.com/polarnl/PolarLearn/commit/44669bbb5b647c7625f22dd82f3121c7d7bfbe19
• https://github.com/polarnl/PolarLearn/security/advisories/GHSA-fhhm-574m-7rpw

Get alerted when CVE-2026-25221 or the next vulnerability affects your stack