[rdiffweb] rdiffweb has no rate limit on resend email feature

rdiffweb prior to 2.5.5 has no rate limit on the “resend email feature” while enable or disable 2FA from /prefs/mfa endpoint .

References

• https://nvd.nist.gov/vuln/detail/CVE-2022-4723
• https://github.com/ikus060/rdiffweb/commit/6e9ee210548f6d3210704cac302cfc7cdb239765
• https://huntr.dev/bounties/9369681b-8bfc-4146-a54c-c5108442d92c
• https://github.com/advisories/GHSA-7q4r-x5qg-mmcp