The openml/openml.org web application version v2.0.20241110 uses predictable MD5-based tokens...

Vulnerability Description

The openml/openml.org web application version v2.0.20241110 uses predictable MD5-based tokens for critical user workflows such as signup confirmation, password resets, email confirmation resends, and email change confirmation. These tokens are generated by hashing the current timestamp formatted as "%d %H:%M:%S" without incorporating any user-specific data or cryptographic randomness. This predictability allows remote attackers to brute-force valid tokens within a small time window, enabling unauthorized account confirmation, password resets, and email change approvals, potentially leading to account takeover.

References

• https://github.com/openml
• https://github.com/openml/openml.org
• https://github.com/openml/openml.org/security/advisories/GHSA-xfjh-gf9p-8qr6