Exposure of sensitive information to an unauthorized actor in HyperKitty
An issue was discovered in management/commands/hyperkitty_import.py in HyperKitty prior to 1.3.5. 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.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | hyperkitty | < 1.3.5 | 1.3.5 |
References
- https://gitlab.com/mailman/hyperkitty/-/issues/380
- https://gitlab.com/mailman/hyperkitty/-/commit/9025324597d60b2dff740e49b70b15589d6804fa
- https://www.debian.org/security/2021/dsa-4922
- https://github.com/advisories/GHSA-h39g-q63v-4h9p
- https://nvd.nist.gov/vuln/detail/CVE-2021-33038
- https://github.com/pypa/advisory-database/tree/main/vulns/hyperkitty/PYSEC-2021-77.yaml
- https://gitlab.com/mailman/hyperkitty
- https://gitlab.com/mailman/hyperkitty/-/blob/master/doc/news.rst#L83-L87
- https://techblog.wikimedia.org/2021/06/11/discovering-and-fixing-cve-2021-33038-in-mailman3
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N- Weakness (CWE)
CWE-200- Platform
- Python (PyPI)
- Package
hyperkitty- Disclosed
- 26.05.2021
- Updated
- 11.10.2026 11:20
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2021-77 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-h39g-q63v-4h9p - CC BY 4.0
Vulnerability history: hyperkitty
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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