CVE-2021-33038

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.

• CWE-276

• https://gitlab.com/mailman/hyperkitty/-/commit/9025324597d60b2dff740e49b70b15589d6804faPatch, Third Party Advisory
• https://gitlab.com/mailman/hyperkitty/-/issues/380Exploit, Issue Tracking, Patch, Third Party Advisory
• https://techblog.wikimedia.org/2021/06/11/discovering-and-fixing-cve-2021-33038-in-mailman3/Patch, Third Party Advisory
• https://www.debian.org/security/2021/dsa-4922Third Party Advisory
• https://gitlab.com/mailman/hyperkitty/-/commit/9025324597d60b2dff740e49b70b15589d6804faPatch, Third Party Advisory
• https://gitlab.com/mailman/hyperkitty/-/issues/380Exploit, Issue Tracking, Patch, Third Party Advisory
• https://techblog.wikimedia.org/2021/06/11/discovering-and-fixing-cve-2021-33038-in-mailman3/Patch, Third Party Advisory
• https://www.debian.org/security/2021/dsa-4922Third Party Advisory

Published

May 26, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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