CVE-2018-18531: Use of Insufficiently Random Values

October 19, 2018 (updated January 25, 2019)

kaptcha 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.

References

nvd.nist.gov/vuln/detail/CVE-2018-18531

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