{"id":"CVE-2021-33038","aliases":["GHSA-h39g-q63v-4h9p","PYSEC-2021-77"],"url":"https://o3.security/vulnerability/CVE-2021-33038","summary":"Exposure of sensitive information to an unauthorized actor in HyperKitty","details":"An issue was discovered in management/commands/hyperkitty_import.py in HyperKitty through 1.3.4. When importing a private mailing list's archives, these archives are publicly visible for the duration of the import. For example, sensitive information might be available on the web for an hour during a large migration from Mailman 2 to Mailman 3.","published":"2021-05-26T14:15:08.913Z","modified":"2026-07-08T06:01:18.169724672Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"PyPI","name":"hyperkitty","fixedVersion":"1.3.5"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://www.debian.org/security/2021/dsa-4922"},{"type":"FIX","url":"https://gitlab.com/mailman/hyperkitty/-/commit/9025324597d60b2dff740e49b70b15589d6804fa"},{"type":"FIX","url":"https://gitlab.com/mailman/hyperkitty/-/issues/380"},{"type":"FIX","url":"https://techblog.wikimedia.org/2021/06/11/discovering-and-fixing-cve-2021-33038-in-mailman3/"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T06:01:18.169724672Z"}}