TI-2021-04405 Aliases CVE-2021-21305 GHSA-cf3w-g86h-35x4

Code Injection vulnerability in CarrierWave

MEDIUM 53CWE-74Published 2021-02-08 · Updated 2024-08-03

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-94.

Summary

CarrierWave is an open-source RubyGem which provides a simple and flexible way to upload files from Ruby applications. In CarrierWave before versions 1.3.2 and 2.1.1, there is a code injection vulnerability. The "#manipulate!" method inappropriately evals the content of mutation option(:read/:write), allowing attackers to craft a string that can be executed as a Ruby code. If an application developer supplies untrusted inputs to the option, it will lead to remote code execution(RCE). This is fixed in versions 1.3.2 and 2.1.1.

Why it matters now

EPSS 0.13208 96th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed carrierwave (carrierwaveuploader): 1.3.2, 2.1.1carrierwave (RubyGems): 1.3.2, 2.1.1

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
carrierwaveuploader	carrierwave	before 1.3.2; 2.0.0 to before 2.1.1	1.3.2, 2.1.1	Patch available	CNA
—	carrierwave (RubyGems)	before 1.3.2	1.3.2	Patch available	GHSA-cf3w-g86h-35x4
—	carrierwave (RubyGems)	2.0.0 to before 2.1.1	2.1.1	Patch available	GHSA-cf3w-g86h-35x4

carrierwave Vendorcarrierwaveuploader Affected before 1.3.2; 2.0.0 to before 2.1.1 Fixed in 1.3.2, 2.1.1 Patch available CNA
carrierwave (RubyGems) Vendor— Affected before 1.3.2 Fixed in 1.3.2 Patch available GHSA-cf3w-g86h-35x4
carrierwave (RubyGems) Vendor— Affected 2.0.0 to before 2.1.1 Fixed in 2.1.1 Patch available GHSA-cf3w-g86h-35x4

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:carrierwave_project:carrierwave::::::ruby::*	before 1.3.2; 2.0.1 to before 2.1.1	Vulnerable	carrierwaveuploader

cpe:2.3:a:carrierwave_project:carrierwave:*:*:*:*:*:ruby:*:* Versions before 1.3.2; 2.0.1 to before 2.1.1 Vulnerable ·carrierwaveuploader

Remediation

Fix · CNA carrierwave (carrierwaveuploader) Fixed in 1.3.2, 2.1.1
Fix · GHSA-cf3w-g86h-35x4 carrierwave (RubyGems) Fixed in 1.3.2 Advisory →
Fix · GHSA-cf3w-g86h-35x4 carrierwave (RubyGems) Fixed in 2.1.1 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2021-21305
2026-10-03 Alias added: GHSA-cf3w-g86h-35x4

References

Exploit 1

https://github.com/carrierwaveuploader/carrierwave/security/advisories/GHSA-cf3w-g86h-35x4

Patch 1

https://github.com/carrierwaveuploader/carrierwave/commit/387116f5c72efa42bc3938d946b4c8d2f22181b7

Advisory 4

Other 2

TI-2026-32499 CarrierWave has a denylisted_content_type bypass via Unescaped Regex Metacharacters CVSS 3.1MEDIUM 6.1
TI-2023-26755 CarrierWave has a content-type allowlist bypass vulnerability, possibly leading to XSS CVSS 3.1MEDIUM 6.8
TI-2024-19216 CarrierWave's Content-Type allowlist bypass vulnerability which possibly leads to XSS remained CVSS 3.1MEDIUM 6.8
TI-2021-04388 Server-side request forgery in CarrierWave CVSS 3.1MEDIUM 4.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences