{"id":"GHSA-8q89-pwhh-7wfq","summary":"Use of Insufficiently Random Values in penggle:kaptcha","details":"text/impl/DefaultTextCreator.java, text/impl/ChineseTextProducer.java, and text/impl/FiveLetterFirstNameTextCreator.java in kaptcha 2.3.2 use the Random (rather than SecureRandom) function for generating CAPTCHA values, which makes it easier for remote attackers to bypass intended access restrictions via a brute-force approach.","aliases":["CVE-2018-18531"],"modified":"2023-11-08T04:00:05.731213Z","published":"2018-10-23T16:08:56Z","database_specific":{"github_reviewed":true,"github_reviewed_at":"2020-06-16T21:26:18Z","nvd_published_at":null,"cwe_ids":["CWE-330"],"severity":"CRITICAL"},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2018-18531"},{"type":"WEB","url":"https://github.com/penggle/kaptcha/issues/3"},{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-8q89-pwhh-7wfq"},{"type":"PACKAGE","url":"https://github.com/penggle/kaptcha"}],"affected":[{"package":{"name":"com.github.penggle:kaptcha","ecosystem":"Maven","purl":"pkg:maven/com.github.penggle/kaptcha"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"2.3.2"}]}],"versions":["2.3.2"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2018/10/GHSA-8q89-pwhh-7wfq/GHSA-8q89-pwhh-7wfq.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}