# Code Injection vulnerability in CarrierWave::RMagick

Advisory record · `GHSA-cf3w-g86h-35x4`

- **Identifiers:** `GHSA-cf3w-g86h-35x4` · `CVE-2021-21305`
- **State:** Confirmed
- **Severity:** CVSS 7.4 High
- **Critical:** Yes: CVSS 7+ and EPSS
- **Weakness (CWE):** [CWE-74](https://cwe.mitre.org/data/definitions/74.html) · [CWE-94](https://cwe.mitre.org/data/definitions/94.html)
- **Tags:** [Other injection](https://agentprime.io/advisories/tag/injection.md) · [Code injection](https://agentprime.io/advisories/tag/code-injection.md)
- **Published:** 8 Feb 2021
- **Updated:** 8 Jul 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 8 Feb 2021, 19:16 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Critical

Critical, because:

- CVSS score 7.4 (7.0 or more) and EPSS 0.13 (0.1 or more): a high score and a real chance of exploitation in the next 30 days.

How we decide what’s critical: <https://agentprime.io/advisories/critical.md>

## Affected packages

- `carrierwave` (RubyGems): affected `<1.3.2 || >=2.0.0, <2.1.1`; fixed in `1.3.2`, `2.1.1`

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 7.4 High, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.13, the 96th percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the GitHub Advisory Database, published 8 Feb 2021. New records show when each source confirmed them.

## Sources

- [GitHub Advisory Database: GHSA-cf3w-g86h-35x4](https://github.com/advisories/GHSA-cf3w-g86h-35x4)
- [OSV: GHSA-cf3w-g86h-35x4](https://osv.dev/vulnerability/GHSA-cf3w-g86h-35x4)
- <https://github.com/carrierwaveuploader/carrierwave/security/advisories/GHSA-cf3w-g86h-35x4>
- <https://nvd.nist.gov/vuln/detail/CVE-2021-21305>
- <https://github.com/carrierwaveuploader/carrierwave/commit/387116f5c72efa42bc3938d946b4c8d2f22181b7>
- <https://github.com/carrierwaveuploader/carrierwave>
- <https://github.com/carrierwaveuploader/carrierwave/blob/master/CHANGELOG.md#132---2021-02-08>
- <https://github.com/carrierwaveuploader/carrierwave/blob/master/CHANGELOG.md#211---2021-02-08>
- <https://github.com/rubysec/ruby-advisory-db/blob/master/gems/carrierwave/CVE-2021-21305.yml>
- <https://rubygems.org/gems/carrierwave>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-cf3w-g86h-35x4>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-cf3w-g86h-35x4/>. Everything for agents: <https://agentprime.io/llms.txt>.