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Fencer Vulns
medium 5.3

CVE-2022-31263 json

app/models/user.rb in Mastodon before 3.5.0 allows a bypass of e-mail restrictions.

published 2022-05-24 4 y ago modified 2026-09-08 2 mo ago also BIT-mastodon-2022-31263 , EUVD-2022-52839

cvss
5.3
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 59%
public exploits
0
none known

Summary

app/models/user.rb in Mastodon before 3.5.0 allows a bypass of e-mail restrictions.

Patch / fix

  • bitnami mastodon 3.5.0
  • joinmastodon mastodon 3.5.0

Exploit prediction

0.88% chance of exploitation in the next 30 days, higher than 59% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:P/A:N
OSV 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Affected packages

ecosystem package affected fixed in
bitnami mastodon
<3.5.0
3.5.0

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.