Provide references for CVE-2015-6250.
Where can I find more information about CVE-2015-6250?
References are available at: https://github.com/claviska/simple-php-captcha/issues/16, http://www.openwall.com/lists/oss-security/2015/08/17/7, https://github.com/claviska/simple-php-captcha/commit/9d65a945029c7be7bb6bc893759e74c5636be694.