Provide references for CVE-2021-3258.
Where can I find more information about CVE-2021-3258?
References are available at: https://nirmaldahal.com.np/sxss-to-defacement-and-account-takeover/, https://www.question2answer.org/qa/58520/important-q2a-ultimate-seo-important-update, https://github.com/q2a-projects/Q2A-Ultimate-SEO/commit/20069f28147c6f2c3acca4e3f6f5154537c5d536.