The SAML identifier generated within SAML2Utils.java was found to make use of the apache commons-lang3 RandomStringUtils class which makes them predictable due to RandomStringUtils PRNG's algorithm not being cryptographically strong. This issue only affects the 3.X release of pac4j-saml.
{
    "github_reviewed_at": "2019-11-05T19:56:04Z",
    "cwe_ids": [
        "CWE-338"
    ],
    "github_reviewed": true,
    "severity": "MODERATE",
    "nvd_published_at": "2019-09-23T23:15:00Z"
}