Provide references for CVE-2021-21260.
Where can I find more information about CVE-2021-21260?
References are available at: https://github.com/bigprof-software/online-invoicing-system/security/advisories/GHSA-rm79-5596-r7q4, https://github.com/bigprof-software/online-invoicing-system/releases/tag/4.2.