Cross site request forgery (csrf)

Oppia is an online learning platform. When comparing a received CSRF token against the expected token, Oppia uses the string equality operator ==, which is not safe against timing attacks. By repeatedly submitting invalid tokens, an attacker can brute-force the expected CSRF token character by...

CVE-2023-40021

Oppia is an online learning platform. When comparing a received CSRF token against the expected token, Oppia uses the string equality operator ==, which is not safe against timing attacks. By repeatedly submitting invalid tokens, an attacker can brute-force the expected CSRF token character by...